hust-epi/whepi-ui/static/plugins/socketio/0.9.17/socket.io.js

/*! Socket.IO.js build:0.9.17, development. Copyright(c) 2011 LearnBoost <dev@learnboost.com> MIT Licensed */

var io = ('undefined' === typeof module ? {} : module.exports);
(function () {

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, global) {

        /**
         * IO namespace.
         *
         * @namespace
         */

        var io = exports;

        /**
         * Socket.IO version
         *
         * @api public
         */

        io.version = '0.9.17';

        /**
         * Protocol implemented.
         *
         * @api public
         */

        io.protocol = 1;

        /**
         * Available transports, these will be populated with the available transports
         *
         * @api public
         */

        io.transports = [];

        /**
         * Keep track of jsonp callbacks.
         *
         * @api private
         */

        io.j = [];

        /**
         * Keep track of our io.Sockets
         *
         * @api private
         */
        io.sockets = {};


        /**
         * Manages connections to hosts.
         *
         * @param {String} uri
         * @Param {Boolean} force creation of new socket (defaults to false)
         * @api public
         */

        io.connect = function (host, details) {
            var uri = io.util.parseUri(host)
                , uuri
                , socket;

            if (global && global.location) {
                uri.protocol = uri.protocol || global.location.protocol.slice(0, -1);
                uri.host = uri.host || (global.document
                        ? global.document.domain : global.location.hostname);
                uri.port = uri.port || global.location.port;
            }

            uuri = io.util.uniqueUri(uri);

            var options = {
                host: uri.host
                , secure: 'https' == uri.protocol
                , port: uri.port || ('https' == uri.protocol ? 443 : 80)
                , query: uri.query || ''
            };

            io.util.merge(options, details);

            if (options['force new connection'] || !io.sockets[uuri]) {
                socket = new io.Socket(options);
            }

            if (!options['force new connection'] && socket) {
                io.sockets[uuri] = socket;
            }

            socket = socket || io.sockets[uuri];

            // if path is different from '' or /
            return socket.of(uri.path.length > 1 ? uri.path : '');
        };

    })('object' === typeof module ? module.exports : (this.io = {}), this);
    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, global) {

        /**
         * Utilities namespace.
         *
         * @namespace
         */

        var util = exports.util = {};

        /**
         * Parses an URI
         *
         * @author Steven Levithan <stevenlevithan.com> (MIT license)
         * @api public
         */

        var re = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

        var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password',
            'host', 'port', 'relative', 'path', 'directory', 'file', 'query',
            'anchor'];

        util.parseUri = function (str) {
            var m = re.exec(str || '')
                , uri = {}
                , i = 14;

            while (i--) {
                uri[parts[i]] = m[i] || '';
            }

            return uri;
        };

        /**
         * Produces a unique url that identifies a Socket.IO connection.
         *
         * @param {Object} uri
         * @api public
         */

        util.uniqueUri = function (uri) {
            var protocol = uri.protocol
                , host = uri.host
                , port = uri.port;

            if ('document' in global) {
                host = host || document.domain;
                port = port || (protocol == 'https'
                    && document.location.protocol !== 'https:' ? 443 : document.location.port);
            } else {
                host = host || 'localhost';

                if (!port && protocol == 'https') {
                    port = 443;
                }
            }

            return (protocol || 'http') + '://' + host + ':' + (port || 80);
        };

        /**
         * Mergest 2 query strings in to once unique query string
         *
         * @param {String} base
         * @param {String} addition
         * @api public
         */

        util.query = function (base, addition) {
            var query = util.chunkQuery(base || '')
                , components = [];

            util.merge(query, util.chunkQuery(addition || ''));
            for (var part in query) {
                if (query.hasOwnProperty(part)) {
                    components.push(part + '=' + query[part]);
                }
            }

            return components.length ? '?' + components.join('&') : '';
        };

        /**
         * Transforms a querystring in to an object
         *
         * @param {String} qs
         * @api public
         */

        util.chunkQuery = function (qs) {
            var query = {}
                , params = qs.split('&')
                , i = 0
                , l = params.length
                , kv;

            for (; i < l; ++i) {
                kv = params[i].split('=');
                if (kv[0]) {
                    query[kv[0]] = kv[1];
                }
            }

            return query;
        };

        /**
         * Executes the given function when the page is loaded.
         *
         *     io.util.load(function () { console.log('page loaded'); });
         *
         * @param {Function} fn
         * @api public
         */

        var pageLoaded = false;

        util.load = function (fn) {
            if ('document' in global && document.readyState === 'complete' || pageLoaded) {
                return fn();
            }

            util.on(global, 'load', fn, false);
        };

        /**
         * Adds an event.
         *
         * @api private
         */

        util.on = function (element, event, fn, capture) {
            if (element.attachEvent) {
                element.attachEvent('on' + event, fn);
            } else if (element.addEventListener) {
                element.addEventListener(event, fn, capture);
            }
        };

        /**
         * Generates the correct `XMLHttpRequest` for regular and cross domain requests.
         *
         * @param {Boolean} [xdomain] Create a request that can be used cross domain.
         * @returns {XMLHttpRequest|false} If we can create a XMLHttpRequest.
         * @api private
         */

        util.request = function (xdomain) {

            if (xdomain && 'undefined' != typeof XDomainRequest && !util.ua.hasCORS) {
                return new XDomainRequest();
            }

            if ('undefined' != typeof XMLHttpRequest && (!xdomain || util.ua.hasCORS)) {
                return new XMLHttpRequest();
            }

            if (!xdomain) {
                try {
                    return new window[(['Active'].concat('Object').join('X'))]('Microsoft.XMLHTTP');
                } catch (e) {
                }
            }

            return null;
        };

        /**
         * XHR based transport constructor.
         *
         * @constructor
         * @api public
         */

        /**
         * Change the internal pageLoaded value.
         */

        if ('undefined' != typeof window) {
            util.load(function () {
                pageLoaded = true;
            });
        }

        /**
         * Defers a function to ensure a spinner is not displayed by the browser
         *
         * @param {Function} fn
         * @api public
         */

        util.defer = function (fn) {
            if (!util.ua.webkit || 'undefined' != typeof importScripts) {
                return fn();
            }

            util.load(function () {
                setTimeout(fn, 100);
            });
        };

        /**
         * Merges two objects.
         *
         * @api public
         */

        util.merge = function merge(target, additional, deep, lastseen) {
            var seen = lastseen || []
                , depth = typeof deep == 'undefined' ? 2 : deep
                , prop;

            for (prop in additional) {
                if (additional.hasOwnProperty(prop) && util.indexOf(seen, prop) < 0) {
                    if (typeof target[prop] !== 'object' || !depth) {
                        target[prop] = additional[prop];
                        seen.push(additional[prop]);
                    } else {
                        util.merge(target[prop], additional[prop], depth - 1, seen);
                    }
                }
            }

            return target;
        };

        /**
         * Merges prototypes from objects
         *
         * @api public
         */

        util.mixin = function (ctor, ctor2) {
            util.merge(ctor.prototype, ctor2.prototype);
        };

        /**
         * Shortcut for prototypical and static inheritance.
         *
         * @api private
         */

        util.inherit = function (ctor, ctor2) {
            function f() {
            };
            f.prototype = ctor2.prototype;
            ctor.prototype = new f;
        };

        /**
         * Checks if the given object is an Array.
         *
         *     io.util.isArray([]); // true
         *     io.util.isArray({}); // false
         *
         * @param Object obj
         * @api public
         */

        util.isArray = Array.isArray || function (obj) {
                return Object.prototype.toString.call(obj) === '[object Array]';
            };

        /**
         * Intersects values of two arrays into a third
         *
         * @api public
         */

        util.intersect = function (arr, arr2) {
            var ret = []
                , longest = arr.length > arr2.length ? arr : arr2
                , shortest = arr.length > arr2.length ? arr2 : arr;

            for (var i = 0, l = shortest.length; i < l; i++) {
                if (~util.indexOf(longest, shortest[i]))
                    ret.push(shortest[i]);
            }

            return ret;
        };

        /**
         * Array indexOf compatibility.
         *
         * @see bit.ly/a5Dxa2
         * @api public
         */

        util.indexOf = function (arr, o, i) {

            for (var j = arr.length, i = i < 0 ? i + j < 0 ? 0 : i + j : i || 0;
                 i < j && arr[i] !== o; i++) {
            }

            return j <= i ? -1 : i;
        };

        /**
         * Converts enumerables to array.
         *
         * @api public
         */

        util.toArray = function (enu) {
            var arr = [];

            for (var i = 0, l = enu.length; i < l; i++)
                arr.push(enu[i]);

            return arr;
        };

        /**
         * UA / engines detection namespace.
         *
         * @namespace
         */

        util.ua = {};

        /**
         * Whether the UA supports CORS for XHR.
         *
         * @api public
         */

        util.ua.hasCORS = 'undefined' != typeof XMLHttpRequest && (function () {
                try {
                    var a = new XMLHttpRequest();
                } catch (e) {
                    return false;
                }

                return a.withCredentials != undefined;
            })();

        /**
         * Detect webkit.
         *
         * @api public
         */

        util.ua.webkit = 'undefined' != typeof navigator
            && /webkit/i.test(navigator.userAgent);

        /**
         * Detect iPad/iPhone/iPod.
         *
         * @api public
         */

        util.ua.iDevice = 'undefined' != typeof navigator
            && /iPad|iPhone|iPod/i.test(navigator.userAgent);

    })('undefined' != typeof io ? io : module.exports, this);
    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io) {

        /**
         * Expose constructor.
         */

        exports.EventEmitter = EventEmitter;

        /**
         * Event emitter constructor.
         *
         * @api public.
         */

        function EventEmitter() {
        };

        /**
         * Adds a listener
         *
         * @api public
         */

        EventEmitter.prototype.on = function (name, fn) {
            if (!this.$events) {
                this.$events = {};
            }

            if (!this.$events[name]) {
                this.$events[name] = fn;
            } else if (io.util.isArray(this.$events[name])) {
                this.$events[name].push(fn);
            } else {
                this.$events[name] = [this.$events[name], fn];
            }

            return this;
        };

        EventEmitter.prototype.addListener = EventEmitter.prototype.on;

        /**
         * Adds a volatile listener.
         *
         * @api public
         */

        EventEmitter.prototype.once = function (name, fn) {
            var self = this;

            function on() {
                self.removeListener(name, on);
                fn.apply(this, arguments);
            };

            on.listener = fn;
            this.on(name, on);

            return this;
        };

        /**
         * Removes a listener.
         *
         * @api public
         */

        EventEmitter.prototype.removeListener = function (name, fn) {
            if (this.$events && this.$events[name]) {
                var list = this.$events[name];

                if (io.util.isArray(list)) {
                    var pos = -1;

                    for (var i = 0, l = list.length; i < l; i++) {
                        if (list[i] === fn || (list[i].listener && list[i].listener === fn)) {
                            pos = i;
                            break;
                        }
                    }

                    if (pos < 0) {
                        return this;
                    }

                    list.splice(pos, 1);

                    if (!list.length) {
                        delete this.$events[name];
                    }
                } else if (list === fn || (list.listener && list.listener === fn)) {
                    delete this.$events[name];
                }
            }

            return this;
        };

        /**
         * Removes all listeners for an event.
         *
         * @api public
         */

        EventEmitter.prototype.removeAllListeners = function (name) {
            if (name === undefined) {
                this.$events = {};
                return this;
            }

            if (this.$events && this.$events[name]) {
                this.$events[name] = null;
            }

            return this;
        };

        /**
         * Gets all listeners for a certain event.
         *
         * @api publci
         */

        EventEmitter.prototype.listeners = function (name) {
            if (!this.$events) {
                this.$events = {};
            }

            if (!this.$events[name]) {
                this.$events[name] = [];
            }

            if (!io.util.isArray(this.$events[name])) {
                this.$events[name] = [this.$events[name]];
            }

            return this.$events[name];
        };

        /**
         * Emits an event.
         *
         * @api public
         */

        EventEmitter.prototype.emit = function (name) {
            if (!this.$events) {
                return false;
            }

            var handler = this.$events[name];

            if (!handler) {
                return false;
            }

            var args = Array.prototype.slice.call(arguments, 1);

            if ('function' == typeof handler) {
                handler.apply(this, args);
            } else if (io.util.isArray(handler)) {
                var listeners = handler.slice();

                for (var i = 0, l = listeners.length; i < l; i++) {
                    listeners[i].apply(this, args);
                }
            } else {
                return false;
            }

            return true;
        };

    })(
        'undefined' != typeof io ? io : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
    );

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    /**
     * Based on JSON2 (http://www.JSON.org/js.html).
     */

    (function (exports, nativeJSON) {
        "use strict";

        // use native JSON if it's available
        if (nativeJSON && nativeJSON.parse) {
            return exports.JSON = {
                parse: nativeJSON.parse
                , stringify: nativeJSON.stringify
            };
        }

        var JSON = exports.JSON = {};

        function f(n) {
            // Format integers to have at least two digits.
            return n < 10 ? '0' + n : n;
        }

        function date(d, key) {
            return isFinite(d.valueOf()) ?
                d.getUTCFullYear() + '-' +
                f(d.getUTCMonth() + 1) + '-' +
                f(d.getUTCDate()) + 'T' +
                f(d.getUTCHours()) + ':' +
                f(d.getUTCMinutes()) + ':' +
                f(d.getUTCSeconds()) + 'Z' : null;
        };

        var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
            escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
            gap,
            indent,
            meta = {    // table of character substitutions
                '\b': '\\b',
                '\t': '\\t',
                '\n': '\\n',
                '\f': '\\f',
                '\r': '\\r',
                '"': '\\"',
                '\\': '\\\\'
            },
            rep;


        function quote(string) {

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.

            escapable.lastIndex = 0;
            return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
                    var c = meta[a];
                    return typeof c === 'string' ? c :
                        '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
                }) + '"' : '"' + string + '"';
        }


        function str(key, holder) {

// Produce a string from holder[key].

            var i,          // The loop counter.
                k,          // The member key.
                v,          // The member value.
                length,
                mind = gap,
                partial,
                value = holder[key];

// If the value has a toJSON method, call it to obtain a replacement value.

            if (value instanceof Date) {
                value = date(key);
            }

// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.

            if (typeof rep === 'function') {
                value = rep.call(holder, key, value);
            }

// What happens next depends on the value's type.

            switch (typeof value) {
                case 'string':
                    return quote(value);

                case 'number':

// JSON numbers must be finite. Encode non-finite numbers as null.

                    return isFinite(value) ? String(value) : 'null';

                case 'boolean':
                case 'null':

// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.

                    return String(value);

// If the type is 'object', we might be dealing with an object or an array or
// null.

                case 'object':

// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.

                    if (!value) {
                        return 'null';
                    }

// Make an array to hold the partial results of stringifying this object value.

                    gap += indent;
                    partial = [];

// Is the value an array?

                    if (Object.prototype.toString.apply(value) === '[object Array]') {

// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

                        length = value.length;
                        for (i = 0; i < length; i += 1) {
                            partial[i] = str(i, value) || 'null';
                        }

// Join all of the elements together, separated with commas, and wrap them in
// brackets.

                        v = partial.length === 0 ? '[]' : gap ?
                            '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
                            '[' + partial.join(',') + ']';
                        gap = mind;
                        return v;
                    }

// If the replacer is an array, use it to select the members to be stringified.

                    if (rep && typeof rep === 'object') {
                        length = rep.length;
                        for (i = 0; i < length; i += 1) {
                            if (typeof rep[i] === 'string') {
                                k = rep[i];
                                v = str(k, value);
                                if (v) {
                                    partial.push(quote(k) + (gap ? ': ' : ':') + v);
                                }
                            }
                        }
                    } else {

// Otherwise, iterate through all of the keys in the object.

                        for (k in value) {
                            if (Object.prototype.hasOwnProperty.call(value, k)) {
                                v = str(k, value);
                                if (v) {
                                    partial.push(quote(k) + (gap ? ': ' : ':') + v);
                                }
                            }
                        }
                    }

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

                    v = partial.length === 0 ? '{}' : gap ?
                        '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
                        '{' + partial.join(',') + '}';
                    gap = mind;
                    return v;
            }
        }

// If the JSON object does not yet have a stringify method, give it one.

        JSON.stringify = function (value, replacer, space) {

// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.

            var i;
            gap = '';
            indent = '';

// If the space parameter is a number, make an indent string containing that
// many spaces.

            if (typeof space === 'number') {
                for (i = 0; i < space; i += 1) {
                    indent += ' ';
                }

// If the space parameter is a string, it will be used as the indent string.

            } else if (typeof space === 'string') {
                indent = space;
            }

// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.

            rep = replacer;
            if (replacer && typeof replacer !== 'function' &&
                (typeof replacer !== 'object' ||
                typeof replacer.length !== 'number')) {
                throw new Error('JSON.stringify');
            }

// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.

            return str('', {'': value});
        };

// If the JSON object does not yet have a parse method, give it one.

        JSON.parse = function (text, reviver) {
            // The parse method takes a text and an optional reviver function, and returns
            // a JavaScript value if the text is a valid JSON text.

            var j;

            function walk(holder, key) {

                // The walk method is used to recursively walk the resulting structure so
                // that modifications can be made.

                var k, v, value = holder[key];
                if (value && typeof value === 'object') {
                    for (k in value) {
                        if (Object.prototype.hasOwnProperty.call(value, k)) {
                            v = walk(value, k);
                            if (v !== undefined) {
                                value[k] = v;
                            } else {
                                delete value[k];
                            }
                        }
                    }
                }
                return reviver.call(holder, key, value);
            }


            // Parsing happens in four stages. In the first stage, we replace certain
            // Unicode characters with escape sequences. JavaScript handles many characters
            // incorrectly, either silently deleting them, or treating them as line endings.

            text = String(text);
            cx.lastIndex = 0;
            if (cx.test(text)) {
                text = text.replace(cx, function (a) {
                    return '\\u' +
                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
                });
            }

            // In the second stage, we run the text against regular expressions that look
            // for non-JSON patterns. We are especially concerned with '()' and 'new'
            // because they can cause invocation, and '=' because it can cause mutation.
            // But just to be safe, we want to reject all unexpected forms.

            // We split the second stage into 4 regexp operations in order to work around
            // crippling inefficiencies in IE's and Safari's regexp engines. First we
            // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
            // replace all simple value tokens with ']' characters. Third, we delete all
            // open brackets that follow a colon or comma or that begin the text. Finally,
            // we look to see that the remaining characters are only whitespace or ']' or
            // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

            if (/^[\],:{}\s]*$/
                    .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
                        .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
                        .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

                // In the third stage we use the eval function to compile the text into a
                // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
                // in JavaScript: it can begin a block or an object literal. We wrap the text
                // in parens to eliminate the ambiguity.

                j = eval('(' + text + ')');

                // In the optional fourth stage, we recursively walk the new structure, passing
                // each name/value pair to a reviver function for possible transformation.

                return typeof reviver === 'function' ?
                    walk({'': j}, '') : j;
            }

            // If the text is not JSON parseable, then a SyntaxError is thrown.

            throw new SyntaxError('JSON.parse');
        };

    })(
        'undefined' != typeof io ? io : module.exports
        , typeof JSON !== 'undefined' ? JSON : undefined
    );

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io) {

        /**
         * Parser namespace.
         *
         * @namespace
         */

        var parser = exports.parser = {};

        /**
         * Packet types.
         */

        var packets = parser.packets = [
            'disconnect'
            , 'connect'
            , 'heartbeat'
            , 'message'
            , 'json'
            , 'event'
            , 'ack'
            , 'error'
            , 'noop'
        ];

        /**
         * Errors reasons.
         */

        var reasons = parser.reasons = [
            'transport not supported'
            , 'client not handshaken'
            , 'unauthorized'
        ];

        /**
         * Errors advice.
         */

        var advice = parser.advice = [
            'reconnect'
        ];

        /**
         * Shortcuts.
         */

        var JSON = io.JSON
            , indexOf = io.util.indexOf;

        /**
         * Encodes a packet.
         *
         * @api private
         */

        parser.encodePacket = function (packet) {
            var type = indexOf(packets, packet.type)
                , id = packet.id || ''
                , endpoint = packet.endpoint || ''
                , ack = packet.ack
                , data = null;

            switch (packet.type) {
                case 'error':
                    var reason = packet.reason ? indexOf(reasons, packet.reason) : ''
                        , adv = packet.advice ? indexOf(advice, packet.advice) : '';

                    if (reason !== '' || adv !== '')
                        data = reason + (adv !== '' ? ('+' + adv) : '');

                    break;

                case 'message':
                    if (packet.data !== '')
                        data = packet.data;
                    break;

                case 'event':
                    var ev = {name: packet.name};

                    if (packet.args && packet.args.length) {
                        ev.args = packet.args;
                    }

                    data = JSON.stringify(ev);
                    break;

                case 'json':
                    data = JSON.stringify(packet.data);
                    break;

                case 'connect':
                    if (packet.qs)
                        data = packet.qs;
                    break;

                case 'ack':
                    data = packet.ackId
                        + (packet.args && packet.args.length
                            ? '+' + JSON.stringify(packet.args) : '');
                    break;
            }

            // construct packet with required fragments
            var encoded = [
                type
                , id + (ack == 'data' ? '+' : '')
                , endpoint
            ];

            // data fragment is optional
            if (data !== null && data !== undefined)
                encoded.push(data);

            return encoded.join(':');
        };

        /**
         * Encodes multiple messages (payload).
         *
         * @param {Array} messages
         * @api private
         */

        parser.encodePayload = function (packets) {
            var decoded = '';

            if (packets.length == 1)
                return packets[0];

            for (var i = 0, l = packets.length; i < l; i++) {
                var packet = packets[i];
                decoded += '\ufffd' + packet.length + '\ufffd' + packets[i];
            }

            return decoded;
        };

        /**
         * Decodes a packet
         *
         * @api private
         */

        var regexp = /([^:]+):([0-9]+)?(\+)?:([^:]+)?:?([\s\S]*)?/;

        parser.decodePacket = function (data) {
            var pieces = data.match(regexp);

            if (!pieces) return {};

            var id = pieces[2] || ''
                , data = pieces[5] || ''
                , packet = {
                type: packets[pieces[1]]
                , endpoint: pieces[4] || ''
            };

            // whether we need to acknowledge the packet
            if (id) {
                packet.id = id;
                if (pieces[3])
                    packet.ack = 'data';
                else
                    packet.ack = true;
            }

            // handle different packet types
            switch (packet.type) {
                case 'error':
                    var pieces = data.split('+');
                    packet.reason = reasons[pieces[0]] || '';
                    packet.advice = advice[pieces[1]] || '';
                    break;

                case 'message':
                    packet.data = data || '';
                    break;

                case 'event':
                    try {
                        var opts = JSON.parse(data);
                        packet.name = opts.name;
                        packet.args = opts.args;
                    } catch (e) {
                    }

                    packet.args = packet.args || [];
                    break;

                case 'json':
                    try {
                        packet.data = JSON.parse(data);
                    } catch (e) {
                    }
                    break;

                case 'connect':
                    packet.qs = data || '';
                    break;

                case 'ack':
                    var pieces = data.match(/^([0-9]+)(\+)?(.*)/);
                    if (pieces) {
                        packet.ackId = pieces[1];
                        packet.args = [];

                        if (pieces[3]) {
                            try {
                                packet.args = pieces[3] ? JSON.parse(pieces[3]) : [];
                            } catch (e) {
                            }
                        }
                    }
                    break;

                case 'disconnect':
                case 'heartbeat':
                    break;
            }
            ;

            return packet;
        };

        /**
         * Decodes data payload. Detects multiple messages
         *
         * @return {Array} messages
         * @api public
         */

        parser.decodePayload = function (data) {
            // IE doesn't like data[i] for unicode chars, charAt works fine
            if (data.charAt(0) == '\ufffd') {
                var ret = [];

                for (var i = 1, length = ''; i < data.length; i++) {
                    if (data.charAt(i) == '\ufffd') {
                        ret.push(parser.decodePacket(data.substr(i + 1).substr(0, length)));
                        i += Number(length) + 1;
                        length = '';
                    } else {
                        length += data.charAt(i);
                    }
                }

                return ret;
            } else {
                return [parser.decodePacket(data)];
            }
        };

    })(
        'undefined' != typeof io ? io : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
    );
    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io) {

        /**
         * Expose constructor.
         */

        exports.Transport = Transport;

        /**
         * This is the transport template for all supported transport methods.
         *
         * @constructor
         * @api public
         */

        function Transport(socket, sessid) {
            this.socket = socket;
            this.sessid = sessid;
        };

        /**
         * Apply EventEmitter mixin.
         */

        io.util.mixin(Transport, io.EventEmitter);


        /**
         * Indicates whether heartbeats is enabled for this transport
         *
         * @api private
         */

        Transport.prototype.heartbeats = function () {
            return true;
        };

        /**
         * Handles the response from the server. When a new response is received
         * it will automatically update the timeout, decode the message and
         * forwards the response to the onMessage function for further processing.
         *
         * @param {String} data Response from the server.
         * @api private
         */

        Transport.prototype.onData = function (data) {
            this.clearCloseTimeout();

            // If the connection in currently open (or in a reopening state) reset the close
            // timeout since we have just received data. This check is necessary so
            // that we don't reset the timeout on an explicitly disconnected connection.
            if (this.socket.connected || this.socket.connecting || this.socket.reconnecting) {
                this.setCloseTimeout();
            }

            if (data !== '') {
                // todo: we should only do decodePayload for xhr transports
                var msgs = io.parser.decodePayload(data);

                if (msgs && msgs.length) {
                    for (var i = 0, l = msgs.length; i < l; i++) {
                        this.onPacket(msgs[i]);
                    }
                }
            }

            return this;
        };

        /**
         * Handles packets.
         *
         * @api private
         */

        Transport.prototype.onPacket = function (packet) {
            this.socket.setHeartbeatTimeout();

            if (packet.type == 'heartbeat') {
                return this.onHeartbeat();
            }

            if (packet.type == 'connect' && packet.endpoint == '') {
                this.onConnect();
            }

            if (packet.type == 'error' && packet.advice == 'reconnect') {
                this.isOpen = false;
            }

            this.socket.onPacket(packet);

            return this;
        };

        /**
         * Sets close timeout
         *
         * @api private
         */

        Transport.prototype.setCloseTimeout = function () {
            if (!this.closeTimeout) {
                var self = this;

                this.closeTimeout = setTimeout(function () {
                    self.onDisconnect();
                }, this.socket.closeTimeout);
            }
        };

        /**
         * Called when transport disconnects.
         *
         * @api private
         */

        Transport.prototype.onDisconnect = function () {
            if (this.isOpen) this.close();
            this.clearTimeouts();
            this.socket.onDisconnect();
            return this;
        };

        /**
         * Called when transport connects
         *
         * @api private
         */

        Transport.prototype.onConnect = function () {
            this.socket.onConnect();
            return this;
        };

        /**
         * Clears close timeout
         *
         * @api private
         */

        Transport.prototype.clearCloseTimeout = function () {
            if (this.closeTimeout) {
                clearTimeout(this.closeTimeout);
                this.closeTimeout = null;
            }
        };

        /**
         * Clear timeouts
         *
         * @api private
         */

        Transport.prototype.clearTimeouts = function () {
            this.clearCloseTimeout();

            if (this.reopenTimeout) {
                clearTimeout(this.reopenTimeout);
            }
        };

        /**
         * Sends a packet
         *
         * @param {Object} packet object.
         * @api private
         */

        Transport.prototype.packet = function (packet) {
            this.send(io.parser.encodePacket(packet));
        };

        /**
         * Send the received heartbeat message back to server. So the server
         * knows we are still connected.
         *
         * @param {String} heartbeat Heartbeat response from the server.
         * @api private
         */

        Transport.prototype.onHeartbeat = function (heartbeat) {
            this.packet({type: 'heartbeat'});
        };

        /**
         * Called when the transport opens.
         *
         * @api private
         */

        Transport.prototype.onOpen = function () {
            this.isOpen = true;
            this.clearCloseTimeout();
            this.socket.onOpen();
        };

        /**
         * Notifies the base when the connection with the Socket.IO server
         * has been disconnected.
         *
         * @api private
         */

        Transport.prototype.onClose = function () {
            var self = this;

            /* FIXME: reopen delay causing a infinit loop
             this.reopenTimeout = setTimeout(function () {
             self.open();
             }, this.socket.options['reopen delay']);*/

            this.isOpen = false;
            this.socket.onClose();
            this.onDisconnect();
        };

        /**
         * Generates a connection url based on the Socket.IO URL Protocol.
         * See <https://github.com/learnboost/socket.io-node/> for more details.
         *
         * @returns {String} Connection url
         * @api private
         */

        Transport.prototype.prepareUrl = function () {
            var options = this.socket.options;

            return this.scheme() + '://'
                + options.host + ':' + options.port + '/'
                + options.resource + '/' + io.protocol
                + '/' + this.name + '/' + this.sessid;
        };

        /**
         * Checks if the transport is ready to start a connection.
         *
         * @param {Socket} socket The socket instance that needs a transport
         * @param {Function} fn The callback
         * @api private
         */

        Transport.prototype.ready = function (socket, fn) {
            fn.call(this);
        };
    })(
        'undefined' != typeof io ? io : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
    );
    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io, global) {

        /**
         * Expose constructor.
         */

        exports.Socket = Socket;

        /**
         * Create a new `Socket.IO client` which can establish a persistent
         * connection with a Socket.IO enabled server.
         *
         * @api public
         */

        function Socket(options) {
            this.options = {
                port: 80
                , secure: false
                , document: 'document' in global ? document : false
                , resource: 'socket.io'
                , transports: io.transports
                , 'connect timeout': 10000
                , 'try multiple transports': true
                , 'reconnect': true
                , 'reconnection delay': 500
                , 'reconnection limit': Infinity
                , 'reopen delay': 3000
                , 'max reconnection attempts': 10
                , 'sync disconnect on unload': false
                , 'auto connect': true
                , 'flash policy port': 10843
                , 'manualFlush': false
            };

            io.util.merge(this.options, options);

            this.connected = false;
            this.open = false;
            this.connecting = false;
            this.reconnecting = false;
            this.namespaces = {};
            this.buffer = [];
            this.doBuffer = false;

            if (this.options['sync disconnect on unload'] &&
                (!this.isXDomain() || io.util.ua.hasCORS)) {
                var self = this;
                io.util.on(global, 'beforeunload', function () {
                    self.disconnectSync();
                }, false);
            }

            if (this.options['auto connect']) {
                this.connect();
            }
        };

        /**
         * Apply EventEmitter mixin.
         */

        io.util.mixin(Socket, io.EventEmitter);

        /**
         * Returns a namespace listener/emitter for this socket
         *
         * @api public
         */

        Socket.prototype.of = function (name) {
            if (!this.namespaces[name]) {
                this.namespaces[name] = new io.SocketNamespace(this, name);

                if (name !== '') {
                    this.namespaces[name].packet({type: 'connect'});
                }
            }

            return this.namespaces[name];
        };

        /**
         * Emits the given event to the Socket and all namespaces
         *
         * @api private
         */

        Socket.prototype.publish = function () {
            this.emit.apply(this, arguments);

            var nsp;

            for (var i in this.namespaces) {
                if (this.namespaces.hasOwnProperty(i)) {
                    nsp = this.of(i);
                    nsp.$emit.apply(nsp, arguments);
                }
            }
        };

        /**
         * Performs the handshake
         *
         * @api private
         */

        function empty() {
        };

        Socket.prototype.handshake = function (fn) {
            var self = this
                , options = this.options;

            function complete(data) {
                if (data instanceof Error) {
                    self.connecting = false;
                    self.onError(data.message);
                } else {
                    fn.apply(null, data.split(':'));
                }
            };

            var url = [
                'http' + (options.secure ? 's' : '') + ':/'
                , options.host + ':' + options.port
                , options.resource
                , io.protocol
                , io.util.query(this.options.query, 't=' + +new Date)
            ].join('/');

            if (this.isXDomain() && !io.util.ua.hasCORS) {
                var insertAt = document.getElementsByTagName('script')[0]
                    , script = document.createElement('script');

                script.src = url + '&jsonp=' + io.j.length;
                insertAt.parentNode.insertBefore(script, insertAt);

                io.j.push(function (data) {
                    complete(data);
                    script.parentNode.removeChild(script);
                });
            } else {
                var xhr = io.util.request();

                xhr.open('GET', url, true);
                if (this.isXDomain()) {
                    xhr.withCredentials = true;
                }
                xhr.onreadystatechange = function () {
                    if (xhr.readyState == 4) {
                        xhr.onreadystatechange = empty;

                        if (xhr.status == 200) {
                            complete(xhr.responseText);
                        } else if (xhr.status == 403) {
                            self.onError(xhr.responseText);
                        } else {
                            self.connecting = false;
                            !self.reconnecting && self.onError(xhr.responseText);
                        }
                    }
                };
                xhr.send(null);
            }
        };

        /**
         * Find an available transport based on the options supplied in the constructor.
         *
         * @api private
         */

        Socket.prototype.getTransport = function (override) {
            var transports = override || this.transports, match;

            for (var i = 0, transport; transport = transports[i]; i++) {
                if (io.Transport[transport]
                    && io.Transport[transport].check(this)
                    && (!this.isXDomain() || io.Transport[transport].xdomainCheck(this))) {
                    return new io.Transport[transport](this, this.sessionid);
                }
            }

            return null;
        };

        /**
         * Connects to the server.
         *
         * @param {Function} [fn] Callback.
         * @returns {io.Socket}
         * @api public
         */

        Socket.prototype.connect = function (fn) {
            if (this.connecting) {
                return this;
            }

            var self = this;
            self.connecting = true;

            this.handshake(function (sid, heartbeat, close, transports) {
                self.sessionid = sid;
                self.closeTimeout = close * 1000;
                self.heartbeatTimeout = heartbeat * 1000;
                if (!self.transports)
                    self.transports = self.origTransports = (transports ? io.util.intersect(
                        transports.split(',')
                        , self.options.transports
                    ) : self.options.transports);

                self.setHeartbeatTimeout();

                function connect(transports) {
                    if (self.transport) self.transport.clearTimeouts();

                    self.transport = self.getTransport(transports);
                    if (!self.transport) return self.publish('connect_failed');

                    // once the transport is ready
                    self.transport.ready(self, function () {
                        self.connecting = true;
                        self.publish('connecting', self.transport.name);
                        self.transport.open();

                        if (self.options['connect timeout']) {
                            self.connectTimeoutTimer = setTimeout(function () {
                                if (!self.connected) {
                                    self.connecting = false;

                                    if (self.options['try multiple transports']) {
                                        var remaining = self.transports;

                                        while (remaining.length > 0 && remaining.splice(0, 1)[0] !=
                                        self.transport.name) {
                                        }

                                        if (remaining.length) {
                                            connect(remaining);
                                        } else {
                                            self.publish('connect_failed');
                                        }
                                    }
                                }
                            }, self.options['connect timeout']);
                        }
                    });
                }

                connect(self.transports);

                self.once('connect', function () {
                    clearTimeout(self.connectTimeoutTimer);

                    fn && typeof fn == 'function' && fn();
                });
            });

            return this;
        };

        /**
         * Clears and sets a new heartbeat timeout using the value given by the
         * server during the handshake.
         *
         * @api private
         */

        Socket.prototype.setHeartbeatTimeout = function () {
            clearTimeout(this.heartbeatTimeoutTimer);
            if (this.transport && !this.transport.heartbeats()) return;

            var self = this;
            this.heartbeatTimeoutTimer = setTimeout(function () {
                self.transport.onClose();
            }, this.heartbeatTimeout);
        };

        /**
         * Sends a message.
         *
         * @param {Object} data packet.
         * @returns {io.Socket}
         * @api public
         */

        Socket.prototype.packet = function (data) {
            if (this.connected && !this.doBuffer) {
                this.transport.packet(data);
            } else {
                this.buffer.push(data);
            }

            return this;
        };

        /**
         * Sets buffer state
         *
         * @api private
         */

        Socket.prototype.setBuffer = function (v) {
            this.doBuffer = v;

            if (!v && this.connected && this.buffer.length) {
                if (!this.options['manualFlush']) {
                    this.flushBuffer();
                }
            }
        };

        /**
         * Flushes the buffer data over the wire.
         * To be invoked manually when 'manualFlush' is set to true.
         *
         * @api public
         */

        Socket.prototype.flushBuffer = function () {
            this.transport.payload(this.buffer);
            this.buffer = [];
        };


        /**
         * Disconnect the established connect.
         *
         * @returns {io.Socket}
         * @api public
         */

        Socket.prototype.disconnect = function () {
            if (this.connected || this.connecting) {
                if (this.open) {
                    this.of('').packet({type: 'disconnect'});
                }

                // handle disconnection immediately
                this.onDisconnect('booted');
            }

            return this;
        };

        /**
         * Disconnects the socket with a sync XHR.
         *
         * @api private
         */

        Socket.prototype.disconnectSync = function () {
            // ensure disconnection
            var xhr = io.util.request();
            var uri = [
                    'http' + (this.options.secure ? 's' : '') + ':/'
                    , this.options.host + ':' + this.options.port
                    , this.options.resource
                    , io.protocol
                    , ''
                    , this.sessionid
                ].join('/') + '/?disconnect=1';

            xhr.open('GET', uri, false);
            xhr.send(null);

            // handle disconnection immediately
            this.onDisconnect('booted');
        };

        /**
         * Check if we need to use cross domain enabled transports. Cross domain would
         * be a different port or different domain name.
         *
         * @returns {Boolean}
         * @api private
         */

        Socket.prototype.isXDomain = function () {

            var port = global.location.port ||
                ('https:' == global.location.protocol ? 443 : 80);

            return this.options.host !== global.location.hostname
                || this.options.port != port;
        };

        /**
         * Called upon handshake.
         *
         * @api private
         */

        Socket.prototype.onConnect = function () {
            if (!this.connected) {
                this.connected = true;
                this.connecting = false;
                if (!this.doBuffer) {
                    // make sure to flush the buffer
                    this.setBuffer(false);
                }
                this.emit('connect');
            }
        };

        /**
         * Called when the transport opens
         *
         * @api private
         */

        Socket.prototype.onOpen = function () {
            this.open = true;
        };

        /**
         * Called when the transport closes.
         *
         * @api private
         */

        Socket.prototype.onClose = function () {
            this.open = false;
            clearTimeout(this.heartbeatTimeoutTimer);
        };

        /**
         * Called when the transport first opens a connection
         *
         * @param text
         */

        Socket.prototype.onPacket = function (packet) {
            this.of(packet.endpoint).onPacket(packet);
        };

        /**
         * Handles an error.
         *
         * @api private
         */

        Socket.prototype.onError = function (err) {
            if (err && err.advice) {
                if (err.advice === 'reconnect' && (this.connected || this.connecting)) {
                    this.disconnect();
                    if (this.options.reconnect) {
                        this.reconnect();
                    }
                }
            }

            this.publish('error', err && err.reason ? err.reason : err);
        };

        /**
         * Called when the transport disconnects.
         *
         * @api private
         */

        Socket.prototype.onDisconnect = function (reason) {
            var wasConnected = this.connected
                , wasConnecting = this.connecting;

            this.connected = false;
            this.connecting = false;
            this.open = false;

            if (wasConnected || wasConnecting) {
                this.transport.close();
                this.transport.clearTimeouts();
                if (wasConnected) {
                    this.publish('disconnect', reason);

                    if ('booted' != reason && this.options.reconnect && !this.reconnecting) {
                        this.reconnect();
                    }
                }
            }
        };

        /**
         * Called upon reconnection.
         *
         * @api private
         */

        Socket.prototype.reconnect = function () {
            this.reconnecting = true;
            this.reconnectionAttempts = 0;
            this.reconnectionDelay = this.options['reconnection delay'];

            var self = this
                , maxAttempts = this.options['max reconnection attempts']
                , tryMultiple = this.options['try multiple transports']
                , limit = this.options['reconnection limit'];

            function reset() {
                if (self.connected) {
                    for (var i in self.namespaces) {
                        if (self.namespaces.hasOwnProperty(i) && '' !== i) {
                            self.namespaces[i].packet({type: 'connect'});
                        }
                    }
                    self.publish('reconnect', self.transport.name, self.reconnectionAttempts);
                }

                clearTimeout(self.reconnectionTimer);

                self.removeListener('connect_failed', maybeReconnect);
                self.removeListener('connect', maybeReconnect);

                self.reconnecting = false;

                delete self.reconnectionAttempts;
                delete self.reconnectionDelay;
                delete self.reconnectionTimer;
                delete self.redoTransports;

                self.options['try multiple transports'] = tryMultiple;
            };

            function maybeReconnect() {
                if (!self.reconnecting) {
                    return;
                }

                if (self.connected) {
                    return reset();
                }
                ;

                if (self.connecting && self.reconnecting) {
                    return self.reconnectionTimer = setTimeout(maybeReconnect, 1000);
                }

                if (self.reconnectionAttempts++ >= maxAttempts) {
                    if (!self.redoTransports) {
                        self.on('connect_failed', maybeReconnect);
                        self.options['try multiple transports'] = true;
                        self.transports = self.origTransports;
                        self.transport = self.getTransport();
                        self.redoTransports = true;
                        self.connect();
                    } else {
                        self.publish('reconnect_failed');
                        reset();
                    }
                } else {
                    if (self.reconnectionDelay < limit) {
                        self.reconnectionDelay *= 2; // exponential back off
                    }

                    self.connect();
                    self.publish('reconnecting', self.reconnectionDelay, self.reconnectionAttempts);
                    self.reconnectionTimer = setTimeout(maybeReconnect, self.reconnectionDelay);
                }
            };

            this.options['try multiple transports'] = false;
            this.reconnectionTimer = setTimeout(maybeReconnect, this.reconnectionDelay);

            this.on('connect', maybeReconnect);
        };

    })(
        'undefined' != typeof io ? io : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
        , this
    );
    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io) {

        /**
         * Expose constructor.
         */

        exports.SocketNamespace = SocketNamespace;

        /**
         * Socket namespace constructor.
         *
         * @constructor
         * @api public
         */

        function SocketNamespace(socket, name) {
            this.socket = socket;
            this.name = name || '';
            this.flags = {};
            this.json = new Flag(this, 'json');
            this.ackPackets = 0;
            this.acks = {};
        };

        /**
         * Apply EventEmitter mixin.
         */

        io.util.mixin(SocketNamespace, io.EventEmitter);

        /**
         * Copies emit since we override it
         *
         * @api private
         */

        SocketNamespace.prototype.$emit = io.EventEmitter.prototype.emit;

        /**
         * Creates a new namespace, by proxying the request to the socket. This
         * allows us to use the synax as we do on the server.
         *
         * @api public
         */

        SocketNamespace.prototype.of = function () {
            return this.socket.of.apply(this.socket, arguments);
        };

        /**
         * Sends a packet.
         *
         * @api private
         */

        SocketNamespace.prototype.packet = function (packet) {
            packet.endpoint = this.name;
            this.socket.packet(packet);
            this.flags = {};
            return this;
        };

        /**
         * Sends a message
         *
         * @api public
         */

        SocketNamespace.prototype.send = function (data, fn) {
            var packet = {
                type: this.flags.json ? 'json' : 'message'
                , data: data
            };

            if ('function' == typeof fn) {
                packet.id = ++this.ackPackets;
                packet.ack = true;
                this.acks[packet.id] = fn;
            }

            return this.packet(packet);
        };

        /**
         * Emits an event
         *
         * @api public
         */

        SocketNamespace.prototype.emit = function (name) {
            var args = Array.prototype.slice.call(arguments, 1)
                , lastArg = args[args.length - 1]
                , packet = {
                type: 'event'
                , name: name
            };

            if ('function' == typeof lastArg) {
                packet.id = ++this.ackPackets;
                packet.ack = 'data';
                this.acks[packet.id] = lastArg;
                args = args.slice(0, args.length - 1);
            }

            packet.args = args;

            return this.packet(packet);
        };

        /**
         * Disconnects the namespace
         *
         * @api private
         */

        SocketNamespace.prototype.disconnect = function () {
            if (this.name === '') {
                this.socket.disconnect();
            } else {
                this.packet({type: 'disconnect'});
                this.$emit('disconnect');
            }

            return this;
        };

        /**
         * Handles a packet
         *
         * @api private
         */

        SocketNamespace.prototype.onPacket = function (packet) {
            var self = this;

            function ack() {
                self.packet({
                    type: 'ack'
                    , args: io.util.toArray(arguments)
                    , ackId: packet.id
                });
            };

            switch (packet.type) {
                case 'connect':
                    this.$emit('connect');
                    break;

                case 'disconnect':
                    if (this.name === '') {
                        this.socket.onDisconnect(packet.reason || 'booted');
                    } else {
                        this.$emit('disconnect', packet.reason);
                    }
                    break;

                case 'message':
                case 'json':
                    var params = ['message', packet.data];

                    if (packet.ack == 'data') {
                        params.push(ack);
                    } else if (packet.ack) {
                        this.packet({type: 'ack', ackId: packet.id});
                    }

                    this.$emit.apply(this, params);
                    break;

                case 'event':
                    var params = [packet.name].concat(packet.args);

                    if (packet.ack == 'data')
                        params.push(ack);

                    this.$emit.apply(this, params);
                    break;

                case 'ack':
                    if (this.acks[packet.ackId]) {
                        this.acks[packet.ackId].apply(this, packet.args);
                        delete this.acks[packet.ackId];
                    }
                    break;

                case 'error':
                    if (packet.advice) {
                        this.socket.onError(packet);
                    } else {
                        if (packet.reason == 'unauthorized') {
                            this.$emit('connect_failed', packet.reason);
                        } else {
                            this.$emit('error', packet.reason);
                        }
                    }
                    break;
            }
        };

        /**
         * Flag interface.
         *
         * @api private
         */

        function Flag(nsp, name) {
            this.namespace = nsp;
            this.name = name;
        };

        /**
         * Send a message
         *
         * @api public
         */

        Flag.prototype.send = function () {
            this.namespace.flags[this.name] = true;
            this.namespace.send.apply(this.namespace, arguments);
        };

        /**
         * Emit an event
         *
         * @api public
         */

        Flag.prototype.emit = function () {
            this.namespace.flags[this.name] = true;
            this.namespace.emit.apply(this.namespace, arguments);
        };

    })(
        'undefined' != typeof io ? io : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
    );

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io, global) {

        /**
         * Expose constructor.
         */

        exports.websocket = WS;

        /**
         * The WebSocket transport uses the HTML5 WebSocket API to establish an
         * persistent connection with the Socket.IO server. This transport will also
         * be inherited by the FlashSocket fallback as it provides a API compatible
         * polyfill for the WebSockets.
         *
         * @constructor
         * @extends {io.Transport}
         * @api public
         */

        function WS(socket) {
            io.Transport.apply(this, arguments);
        };

        /**
         * Inherits from Transport.
         */

        io.util.inherit(WS, io.Transport);

        /**
         * Transport name
         *
         * @api public
         */

        WS.prototype.name = 'websocket';

        /**
         * Initializes a new `WebSocket` connection with the Socket.IO server. We attach
         * all the appropriate listeners to handle the responses from the server.
         *
         * @returns {Transport}
         * @api public
         */

        WS.prototype.open = function () {
            var query = io.util.query(this.socket.options.query)
                , self = this
                , Socket


            if (!Socket) {
                Socket = global.MozWebSocket || global.WebSocket;
            }

            this.websocket = new Socket(this.prepareUrl() + query);

            this.websocket.onopen = function () {
                self.onOpen();
                self.socket.setBuffer(false);
            };
            this.websocket.onmessage = function (ev) {
                self.onData(ev.data);
            };
            this.websocket.onclose = function () {
                self.onClose();
                self.socket.setBuffer(true);
            };
            this.websocket.onerror = function (e) {
                self.onError(e);
            };

            return this;
        };

        /**
         * Send a message to the Socket.IO server. The message will automatically be
         * encoded in the correct message format.
         *
         * @returns {Transport}
         * @api public
         */

        // Do to a bug in the current IDevices browser, we need to wrap the send in a
        // setTimeout, when they resume from sleeping the browser will crash if
        // we don't allow the browser time to detect the socket has been closed
        if (io.util.ua.iDevice) {
            WS.prototype.send = function (data) {
                var self = this;
                setTimeout(function () {
                    self.websocket.send(data);
                }, 0);
                return this;
            };
        } else {
            WS.prototype.send = function (data) {
                this.websocket.send(data);
                return this;
            };
        }

        /**
         * Payload
         *
         * @api private
         */

        WS.prototype.payload = function (arr) {
            for (var i = 0, l = arr.length; i < l; i++) {
                this.packet(arr[i]);
            }
            return this;
        };

        /**
         * Disconnect the established `WebSocket` connection.
         *
         * @returns {Transport}
         * @api public
         */

        WS.prototype.close = function () {
            this.websocket.close();
            return this;
        };

        /**
         * Handle the errors that `WebSocket` might be giving when we
         * are attempting to connect or send messages.
         *
         * @param {Error} e The error.
         * @api private
         */

        WS.prototype.onError = function (e) {
            this.socket.onError(e);
        };

        /**
         * Returns the appropriate scheme for the URI generation.
         *
         * @api private
         */
        WS.prototype.scheme = function () {
            return this.socket.options.secure ? 'wss' : 'ws';
        };

        /**
         * Checks if the browser has support for native `WebSockets` and that
         * it's not the polyfill created for the FlashSocket transport.
         *
         * @return {Boolean}
         * @api public
         */

        WS.check = function () {
            return ('WebSocket' in global && !('__addTask' in WebSocket))
                || 'MozWebSocket' in global;
        };

        /**
         * Check if the `WebSocket` transport support cross domain communications.
         *
         * @returns {Boolean}
         * @api public
         */

        WS.xdomainCheck = function () {
            return true;
        };

        /**
         * Add the transport to your public io.transports array.
         *
         * @api private
         */

        io.transports.push('websocket');

    })(
        'undefined' != typeof io ? io.Transport : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
        , this
    );

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io) {

        /**
         * Expose constructor.
         */

        exports.flashsocket = Flashsocket;

        /**
         * The FlashSocket transport. This is a API wrapper for the HTML5 WebSocket
         * specification. It uses a .swf file to communicate with the server. If you want
         * to serve the .swf file from a other server than where the Socket.IO script is
         * coming from you need to use the insecure version of the .swf. More information
         * about this can be found on the github page.
         *
         * @constructor
         * @extends {io.Transport.websocket}
         * @api public
         */

        function Flashsocket() {
            io.Transport.websocket.apply(this, arguments);
        };

        /**
         * Inherits from Transport.
         */

        io.util.inherit(Flashsocket, io.Transport.websocket);

        /**
         * Transport name
         *
         * @api public
         */

        Flashsocket.prototype.name = 'flashsocket';

        /**
         * Disconnect the established `FlashSocket` connection. This is done by adding a
         * new task to the FlashSocket. The rest will be handled off by the `WebSocket`
         * transport.
         *
         * @returns {Transport}
         * @api public
         */

        Flashsocket.prototype.open = function () {
            var self = this
                , args = arguments;

            WebSocket.__addTask(function () {
                io.Transport.websocket.prototype.open.apply(self, args);
            });
            return this;
        };

        /**
         * Sends a message to the Socket.IO server. This is done by adding a new
         * task to the FlashSocket. The rest will be handled off by the `WebSocket`
         * transport.
         *
         * @returns {Transport}
         * @api public
         */

        Flashsocket.prototype.send = function () {
            var self = this, args = arguments;
            WebSocket.__addTask(function () {
                io.Transport.websocket.prototype.send.apply(self, args);
            });
            return this;
        };

        /**
         * Disconnects the established `FlashSocket` connection.
         *
         * @returns {Transport}
         * @api public
         */

        Flashsocket.prototype.close = function () {
            WebSocket.__tasks.length = 0;
            io.Transport.websocket.prototype.close.call(this);
            return this;
        };

        /**
         * The WebSocket fall back needs to append the flash container to the body
         * element, so we need to make sure we have access to it. Or defer the call
         * until we are sure there is a body element.
         *
         * @param {Socket} socket The socket instance that needs a transport
         * @param {Function} fn The callback
         * @api private
         */

        Flashsocket.prototype.ready = function (socket, fn) {
            function init() {
                var options = socket.options
                    , port = options['flash policy port']
                    , path = [
                    'http' + (options.secure ? 's' : '') + ':/'
                    , options.host + ':' + options.port
                    , options.resource
                    , 'static/flashsocket'
                    , 'WebSocketMain' + (socket.isXDomain() ? 'Insecure' : '') + '.swf'
                ];

                // Only start downloading the swf file when the checked that this browser
                // actually supports it
                if (!Flashsocket.loaded) {
                    if (typeof WEB_SOCKET_SWF_LOCATION === 'undefined') {
                        // Set the correct file based on the XDomain settings
                        WEB_SOCKET_SWF_LOCATION = path.join('/');
                    }

                    if (port !== 843) {
                        WebSocket.loadFlashPolicyFile('xmlsocket://' + options.host + ':' + port);
                    }

                    WebSocket.__initialize();
                    Flashsocket.loaded = true;
                }

                fn.call(self);
            }

            var self = this;
            if (document.body) return init();

            io.util.load(init);
        };

        /**
         * Check if the FlashSocket transport is supported as it requires that the Adobe
         * Flash Player plug-in version `10.0.0` or greater is installed. And also check if
         * the polyfill is correctly loaded.
         *
         * @returns {Boolean}
         * @api public
         */

        Flashsocket.check = function () {
            if (
                typeof WebSocket == 'undefined'
                || !('__initialize' in WebSocket) || !swfobject
            ) return false;

            return swfobject.getFlashPlayerVersion().major >= 10;
        };

        /**
         * Check if the FlashSocket transport can be used as cross domain / cross origin
         * transport. Because we can't see which type (secure or insecure) of .swf is used
         * we will just return true.
         *
         * @returns {Boolean}
         * @api public
         */

        Flashsocket.xdomainCheck = function () {
            return true;
        };

        /**
         * Disable AUTO_INITIALIZATION
         */

        if (typeof window != 'undefined') {
            WEB_SOCKET_DISABLE_AUTO_INITIALIZATION = true;
        }

        /**
         * Add the transport to your public io.transports array.
         *
         * @api private
         */

        io.transports.push('flashsocket');
    })(
        'undefined' != typeof io ? io.Transport : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
    );
    /*	SWFObject v2.2 <http://code.google.com/p/swfobject/>
     is released under the MIT License <http://www.opensource.org/licenses/mit-license.php>
     */
    if ('undefined' != typeof window) {
        var swfobject = function () {
            var D = "undefined", r = "object", S = "Shockwave Flash", W = "ShockwaveFlash.ShockwaveFlash",
                q = "application/x-shockwave-flash", R = "SWFObjectExprInst", x = "onreadystatechange", O = window,
                j = document, t = navigator, T = false, U = [h], o = [], N = [], I = [], l, Q, E, B, J = false,
                a = false, n, G, m = true, M = function () {
                    var aa = typeof j.getElementById != D && typeof j.getElementsByTagName != D && typeof j.createElement != D,
                        ah = t.userAgent.toLowerCase(), Y = t.platform.toLowerCase(),
                        ae = Y ? /win/.test(Y) : /win/.test(ah), ac = Y ? /mac/.test(Y) : /mac/.test(ah),
                        af = /webkit/.test(ah) ? parseFloat(ah.replace(/^.*webkit\/(\d+(\.\d+)?).*$/, "$1")) : false,
                        X = !+"\v1", ag = [0, 0, 0], ab = null;
                    if (typeof t.plugins != D && typeof t.plugins[S] == r) {
                        ab = t.plugins[S].description;
                        if (ab && !(typeof t.mimeTypes != D && t.mimeTypes[q] && !t.mimeTypes[q].enabledPlugin)) {
                            T = true;
                            X = false;
                            ab = ab.replace(/^.*\s+(\S+\s+\S+$)/, "$1");
                            ag[0] = parseInt(ab.replace(/^(.*)\..*$/, "$1"), 10);
                            ag[1] = parseInt(ab.replace(/^.*\.(.*)\s.*$/, "$1"), 10);
                            ag[2] = /[a-zA-Z]/.test(ab) ? parseInt(ab.replace(/^.*[a-zA-Z]+(.*)$/, "$1"), 10) : 0
                        }
                    } else {
                        if (typeof O[(['Active'].concat('Object').join('X'))] != D) {
                            try {
                                var ad = new window[(['Active'].concat('Object').join('X'))](W);
                                if (ad) {
                                    ab = ad.GetVariable("$version");
                                    if (ab) {
                                        X = true;
                                        ab = ab.split(" ")[1].split(",");
                                        ag = [parseInt(ab[0], 10), parseInt(ab[1], 10), parseInt(ab[2], 10)]
                                    }
                                }
                            } catch (Z) {
                            }
                        }
                    }
                    return {w3: aa, pv: ag, wk: af, ie: X, win: ae, mac: ac}
                }(), k = function () {
                    if (!M.w3) {
                        return
                    }
                    if ((typeof j.readyState != D && j.readyState == "complete") || (typeof j.readyState == D && (j.getElementsByTagName("body")[0] || j.body))) {
                        f()
                    }
                    if (!J) {
                        if (typeof j.addEventListener != D) {
                            j.addEventListener("DOMContentLoaded", f, false)
                        }
                        if (M.ie && M.win) {
                            j.attachEvent(x, function () {
                                if (j.readyState == "complete") {
                                    j.detachEvent(x, arguments.callee);
                                    f()
                                }
                            });
                            if (O == top) {
                                (function () {
                                    if (J) {
                                        return
                                    }
                                    try {
                                        j.documentElement.doScroll("left")
                                    } catch (X) {
                                        setTimeout(arguments.callee, 0);
                                        return
                                    }
                                    f()
                                })()
                            }
                        }
                        if (M.wk) {
                            (function () {
                                if (J) {
                                    return
                                }
                                if (!/loaded|complete/.test(j.readyState)) {
                                    setTimeout(arguments.callee, 0);
                                    return
                                }
                                f()
                            })()
                        }
                        s(f)
                    }
                }();

            function f() {
                if (J) {
                    return
                }
                try {
                    var Z = j.getElementsByTagName("body")[0].appendChild(C("span"));
                    Z.parentNode.removeChild(Z)
                } catch (aa) {
                    return
                }
                J = true;
                var X = U.length;
                for (var Y = 0; Y < X; Y++) {
                    U[Y]()
                }
            }

            function K(X) {
                if (J) {
                    X()
                } else {
                    U[U.length] = X
                }
            }

            function s(Y) {
                if (typeof O.addEventListener != D) {
                    O.addEventListener("load", Y, false)
                } else {
                    if (typeof j.addEventListener != D) {
                        j.addEventListener("load", Y, false)
                    } else {
                        if (typeof O.attachEvent != D) {
                            i(O, "onload", Y)
                        } else {
                            if (typeof O.onload == "function") {
                                var X = O.onload;
                                O.onload = function () {
                                    X();
                                    Y()
                                }
                            } else {
                                O.onload = Y
                            }
                        }
                    }
                }
            }

            function h() {
                if (T) {
                    V()
                } else {
                    H()
                }
            }

            function V() {
                var X = j.getElementsByTagName("body")[0];
                var aa = C(r);
                aa.setAttribute("type", q);
                var Z = X.appendChild(aa);
                if (Z) {
                    var Y = 0;
                    (function () {
                        if (typeof Z.GetVariable != D) {
                            var ab = Z.GetVariable("$version");
                            if (ab) {
                                ab = ab.split(" ")[1].split(",");
                                M.pv = [parseInt(ab[0], 10), parseInt(ab[1], 10), parseInt(ab[2], 10)]
                            }
                        } else {
                            if (Y < 10) {
                                Y++;
                                setTimeout(arguments.callee, 10);
                                return
                            }
                        }
                        X.removeChild(aa);
                        Z = null;
                        H()
                    })()
                } else {
                    H()
                }
            }

            function H() {
                var ag = o.length;
                if (ag > 0) {
                    for (var af = 0; af < ag; af++) {
                        var Y = o[af].id;
                        var ab = o[af].callbackFn;
                        var aa = {success: false, id: Y};
                        if (M.pv[0] > 0) {
                            var ae = c(Y);
                            if (ae) {
                                if (F(o[af].swfVersion) && !(M.wk && M.wk < 312)) {
                                    w(Y, true);
                                    if (ab) {
                                        aa.success = true;
                                        aa.ref = z(Y);
                                        ab(aa)
                                    }
                                } else {
                                    if (o[af].expressInstall && A()) {
                                        var ai = {};
                                        ai.data = o[af].expressInstall;
                                        ai.width = ae.getAttribute("width") || "0";
                                        ai.height = ae.getAttribute("height") || "0";
                                        if (ae.getAttribute("class")) {
                                            ai.styleclass = ae.getAttribute("class")
                                        }
                                        if (ae.getAttribute("align")) {
                                            ai.align = ae.getAttribute("align")
                                        }
                                        var ah = {};
                                        var X = ae.getElementsByTagName("param");
                                        var ac = X.length;
                                        for (var ad = 0; ad < ac; ad++) {
                                            if (X[ad].getAttribute("name").toLowerCase() != "movie") {
                                                ah[X[ad].getAttribute("name")] = X[ad].getAttribute("value")
                                            }
                                        }
                                        P(ai, ah, Y, ab)
                                    } else {
                                        p(ae);
                                        if (ab) {
                                            ab(aa)
                                        }
                                    }
                                }
                            }
                        } else {
                            w(Y, true);
                            if (ab) {
                                var Z = z(Y);
                                if (Z && typeof Z.SetVariable != D) {
                                    aa.success = true;
                                    aa.ref = Z
                                }
                                ab(aa)
                            }
                        }
                    }
                }
            }

            function z(aa) {
                var X = null;
                var Y = c(aa);
                if (Y && Y.nodeName == "OBJECT") {
                    if (typeof Y.SetVariable != D) {
                        X = Y
                    } else {
                        var Z = Y.getElementsByTagName(r)[0];
                        if (Z) {
                            X = Z
                        }
                    }
                }
                return X
            }

            function A() {
                return !a && F("6.0.65") && (M.win || M.mac) && !(M.wk && M.wk < 312)
            }

            function P(aa, ab, X, Z) {
                a = true;
                E = Z || null;
                B = {success: false, id: X};
                var ae = c(X);
                if (ae) {
                    if (ae.nodeName == "OBJECT") {
                        l = g(ae);
                        Q = null
                    } else {
                        l = ae;
                        Q = X
                    }
                    aa.id = R;
                    if (typeof aa.width == D || (!/%$/.test(aa.width) && parseInt(aa.width, 10) < 310)) {
                        aa.width = "310"
                    }
                    if (typeof aa.height == D || (!/%$/.test(aa.height) && parseInt(aa.height, 10) < 137)) {
                        aa.height = "137"
                    }
                    j.title = j.title.slice(0, 47) + " - Flash Player Installation";
                    var ad = M.ie && M.win ? (['Active'].concat('').join('X')) : "PlugIn",
                        ac = "MMredirectURL=" + O.location.toString().replace(/&/g, "%26") + "&MMplayerType=" + ad + "&MMdoctitle=" + j.title;
                    if (typeof ab.flashvars != D) {
                        ab.flashvars += "&" + ac
                    } else {
                        ab.flashvars = ac
                    }
                    if (M.ie && M.win && ae.readyState != 4) {
                        var Y = C("div");
                        X += "SWFObjectNew";
                        Y.setAttribute("id", X);
                        ae.parentNode.insertBefore(Y, ae);
                        ae.style.display = "none";
                        (function () {
                            if (ae.readyState == 4) {
                                ae.parentNode.removeChild(ae)
                            } else {
                                setTimeout(arguments.callee, 10)
                            }
                        })()
                    }
                    u(aa, ab, X)
                }
            }

            function p(Y) {
                if (M.ie && M.win && Y.readyState != 4) {
                    var X = C("div");
                    Y.parentNode.insertBefore(X, Y);
                    X.parentNode.replaceChild(g(Y), X);
                    Y.style.display = "none";
                    (function () {
                        if (Y.readyState == 4) {
                            Y.parentNode.removeChild(Y)
                        } else {
                            setTimeout(arguments.callee, 10)
                        }
                    })()
                } else {
                    Y.parentNode.replaceChild(g(Y), Y)
                }
            }

            function g(ab) {
                var aa = C("div");
                if (M.win && M.ie) {
                    aa.innerHTML = ab.innerHTML
                } else {
                    var Y = ab.getElementsByTagName(r)[0];
                    if (Y) {
                        var ad = Y.childNodes;
                        if (ad) {
                            var X = ad.length;
                            for (var Z = 0; Z < X; Z++) {
                                if (!(ad[Z].nodeType == 1 && ad[Z].nodeName == "PARAM") && !(ad[Z].nodeType == 8)) {
                                    aa.appendChild(ad[Z].cloneNode(true))
                                }
                            }
                        }
                    }
                }
                return aa
            }

            function u(ai, ag, Y) {
                var X, aa = c(Y);
                if (M.wk && M.wk < 312) {
                    return X
                }
                if (aa) {
                    if (typeof ai.id == D) {
                        ai.id = Y
                    }
                    if (M.ie && M.win) {
                        var ah = "";
                        for (var ae in ai) {
                            if (ai[ae] != Object.prototype[ae]) {
                                if (ae.toLowerCase() == "data") {
                                    ag.movie = ai[ae]
                                } else {
                                    if (ae.toLowerCase() == "styleclass") {
                                        ah += ' class="' + ai[ae] + '"'
                                    } else {
                                        if (ae.toLowerCase() != "classid") {
                                            ah += " " + ae + '="' + ai[ae] + '"'
                                        }
                                    }
                                }
                            }
                        }
                        var af = "";
                        for (var ad in ag) {
                            if (ag[ad] != Object.prototype[ad]) {
                                af += '<param name="' + ad + '" value="' + ag[ad] + '" />'
                            }
                        }
                        aa.outerHTML = '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"' + ah + ">" + af + "</object>";
                        N[N.length] = ai.id;
                        X = c(ai.id)
                    } else {
                        var Z = C(r);
                        Z.setAttribute("type", q);
                        for (var ac in ai) {
                            if (ai[ac] != Object.prototype[ac]) {
                                if (ac.toLowerCase() == "styleclass") {
                                    Z.setAttribute("class", ai[ac])
                                } else {
                                    if (ac.toLowerCase() != "classid") {
                                        Z.setAttribute(ac, ai[ac])
                                    }
                                }
                            }
                        }
                        for (var ab in ag) {
                            if (ag[ab] != Object.prototype[ab] && ab.toLowerCase() != "movie") {
                                e(Z, ab, ag[ab])
                            }
                        }
                        aa.parentNode.replaceChild(Z, aa);
                        X = Z
                    }
                }
                return X
            }

            function e(Z, X, Y) {
                var aa = C("param");
                aa.setAttribute("name", X);
                aa.setAttribute("value", Y);
                Z.appendChild(aa)
            }

            function y(Y) {
                var X = c(Y);
                if (X && X.nodeName == "OBJECT") {
                    if (M.ie && M.win) {
                        X.style.display = "none";
                        (function () {
                            if (X.readyState == 4) {
                                b(Y)
                            } else {
                                setTimeout(arguments.callee, 10)
                            }
                        })()
                    } else {
                        X.parentNode.removeChild(X)
                    }
                }
            }

            function b(Z) {
                var Y = c(Z);
                if (Y) {
                    for (var X in Y) {
                        if (typeof Y[X] == "function") {
                            Y[X] = null
                        }
                    }
                    Y.parentNode.removeChild(Y)
                }
            }

            function c(Z) {
                var X = null;
                try {
                    X = j.getElementById(Z)
                } catch (Y) {
                }
                return X
            }

            function C(X) {
                return j.createElement(X)
            }

            function i(Z, X, Y) {
                Z.attachEvent(X, Y);
                I[I.length] = [Z, X, Y]
            }

            function F(Z) {
                var Y = M.pv, X = Z.split(".");
                X[0] = parseInt(X[0], 10);
                X[1] = parseInt(X[1], 10) || 0;
                X[2] = parseInt(X[2], 10) || 0;
                return (Y[0] > X[0] || (Y[0] == X[0] && Y[1] > X[1]) || (Y[0] == X[0] && Y[1] == X[1] && Y[2] >= X[2])) ? true : false
            }

            function v(ac, Y, ad, ab) {
                if (M.ie && M.mac) {
                    return
                }
                var aa = j.getElementsByTagName("head")[0];
                if (!aa) {
                    return
                }
                var X = (ad && typeof ad == "string") ? ad : "screen";
                if (ab) {
                    n = null;
                    G = null
                }
                if (!n || G != X) {
                    var Z = C("style");
                    Z.setAttribute("type", "text/css");
                    Z.setAttribute("media", X);
                    n = aa.appendChild(Z);
                    if (M.ie && M.win && typeof j.styleSheets != D && j.styleSheets.length > 0) {
                        n = j.styleSheets[j.styleSheets.length - 1]
                    }
                    G = X
                }
                if (M.ie && M.win) {
                    if (n && typeof n.addRule == r) {
                        n.addRule(ac, Y)
                    }
                } else {
                    if (n && typeof j.createTextNode != D) {
                        n.appendChild(j.createTextNode(ac + " {" + Y + "}"))
                    }
                }
            }

            function w(Z, X) {
                if (!m) {
                    return
                }
                var Y = X ? "visible" : "hidden";
                if (J && c(Z)) {
                    c(Z).style.visibility = Y
                } else {
                    v("#" + Z, "visibility:" + Y)
                }
            }

            function L(Y) {
                var Z = /[\\\"<>\.;]/;
                var X = Z.exec(Y) != null;
                return X && typeof encodeURIComponent != D ? encodeURIComponent(Y) : Y
            }

            var d = function () {
                if (M.ie && M.win) {
                    window.attachEvent("onunload", function () {
                        var ac = I.length;
                        for (var ab = 0; ab < ac; ab++) {
                            I[ab][0].detachEvent(I[ab][1], I[ab][2])
                        }
                        var Z = N.length;
                        for (var aa = 0; aa < Z; aa++) {
                            y(N[aa])
                        }
                        for (var Y in M) {
                            M[Y] = null
                        }
                        M = null;
                        for (var X in swfobject) {
                            swfobject[X] = null
                        }
                        swfobject = null
                    })
                }
            }();
            return {
                registerObject: function (ab, X, aa, Z) {
                    if (M.w3 && ab && X) {
                        var Y = {};
                        Y.id = ab;
                        Y.swfVersion = X;
                        Y.expressInstall = aa;
                        Y.callbackFn = Z;
                        o[o.length] = Y;
                        w(ab, false)
                    } else {
                        if (Z) {
                            Z({success: false, id: ab})
                        }
                    }
                }, getObjectById: function (X) {
                    if (M.w3) {
                        return z(X)
                    }
                }, embedSWF: function (ab, ah, ae, ag, Y, aa, Z, ad, af, ac) {
                    var X = {success: false, id: ah};
                    if (M.w3 && !(M.wk && M.wk < 312) && ab && ah && ae && ag && Y) {
                        w(ah, false);
                        K(function () {
                            ae += "";
                            ag += "";
                            var aj = {};
                            if (af && typeof af === r) {
                                for (var al in af) {
                                    aj[al] = af[al]
                                }
                            }
                            aj.data = ab;
                            aj.width = ae;
                            aj.height = ag;
                            var am = {};
                            if (ad && typeof ad === r) {
                                for (var ak in ad) {
                                    am[ak] = ad[ak]
                                }
                            }
                            if (Z && typeof Z === r) {
                                for (var ai in Z) {
                                    if (typeof am.flashvars != D) {
                                        am.flashvars += "&" + ai + "=" + Z[ai]
                                    } else {
                                        am.flashvars = ai + "=" + Z[ai]
                                    }
                                }
                            }
                            if (F(Y)) {
                                var an = u(aj, am, ah);
                                if (aj.id == ah) {
                                    w(ah, true)
                                }
                                X.success = true;
                                X.ref = an
                            } else {
                                if (aa && A()) {
                                    aj.data = aa;
                                    P(aj, am, ah, ac);
                                    return
                                } else {
                                    w(ah, true)
                                }
                            }
                            if (ac) {
                                ac(X)
                            }
                        })
                    } else {
                        if (ac) {
                            ac(X)
                        }
                    }
                }, switchOffAutoHideShow: function () {
                    m = false
                }, ua: M, getFlashPlayerVersion: function () {
                    return {major: M.pv[0], minor: M.pv[1], release: M.pv[2]}
                }, hasFlashPlayerVersion: F, createSWF: function (Z, Y, X) {
                    if (M.w3) {
                        return u(Z, Y, X)
                    } else {
                        return undefined
                    }
                }, showExpressInstall: function (Z, aa, X, Y) {
                    if (M.w3 && A()) {
                        P(Z, aa, X, Y)
                    }
                }, removeSWF: function (X) {
                    if (M.w3) {
                        y(X)
                    }
                }, createCSS: function (aa, Z, Y, X) {
                    if (M.w3) {
                        v(aa, Z, Y, X)
                    }
                }, addDomLoadEvent: K, addLoadEvent: s, getQueryParamValue: function (aa) {
                    var Z = j.location.search || j.location.hash;
                    if (Z) {
                        if (/\?/.test(Z)) {
                            Z = Z.split("?")[1]
                        }
                        if (aa == null) {
                            return L(Z)
                        }
                        var Y = Z.split("&");
                        for (var X = 0; X < Y.length; X++) {
                            if (Y[X].substring(0, Y[X].indexOf("=")) == aa) {
                                return L(Y[X].substring((Y[X].indexOf("=") + 1)))
                            }
                        }
                    }
                    return ""
                }, expressInstallCallback: function () {
                    if (a) {
                        var X = c(R);
                        if (X && l) {
                            X.parentNode.replaceChild(l, X);
                            if (Q) {
                                w(Q, true);
                                if (M.ie && M.win) {
                                    l.style.display = "block"
                                }
                            }
                            if (E) {
                                E(B)
                            }
                        }
                        a = false
                    }
                }
            }
        }();
    }
// Copyright: Hiroshi Ichikawa <http://gimite.net/en/>
// License: New BSD License
// Reference: http://dev.w3.org/html5/websockets/
// Reference: http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol

    (function () {

        if ('undefined' == typeof window || window.WebSocket) return;

        var console = window.console;
        if (!console || !console.log || !console.error) {
            console = {
                log: function () {
                }, error: function () {
                }
            };
        }

        if (!swfobject.hasFlashPlayerVersion("10.0.0")) {
            console.error("Flash Player >= 10.0.0 is required.");
            return;
        }
        if (location.protocol == "file:") {
            console.error(
                "WARNING: web-socket-js doesn't work in file:///... URL " +
                "unless you set Flash Security Settings properly. " +
                "Open the page via Web server i.e. http://...");
        }

        /**
         * This class represents a faux web socket.
         * @param {string} url
         * @param {array or string} protocols
         * @param {string} proxyHost
         * @param {int} proxyPort
         * @param {string} headers
         */
        WebSocket = function (url, protocols, proxyHost, proxyPort, headers) {
            var self = this;
            self.__id = WebSocket.__nextId++;
            WebSocket.__instances[self.__id] = self;
            self.readyState = WebSocket.CONNECTING;
            self.bufferedAmount = 0;
            self.__events = {};
            if (!protocols) {
                protocols = [];
            } else if (typeof protocols == "string") {
                protocols = [protocols];
            }
            // Uses setTimeout() to make sure __createFlash() runs after the caller sets ws.onopen etc.
            // Otherwise, when onopen fires immediately, onopen is called before it is set.
            setTimeout(function () {
                WebSocket.__addTask(function () {
                    WebSocket.__flash.create(
                        self.__id, url, protocols, proxyHost || null, proxyPort || 0, headers || null);
                });
            }, 0);
        };

        /**
         * Send data to the web socket.
         * @param {string} data  The data to send to the socket.
         * @return {boolean}  True for success, false for failure.
         */
        WebSocket.prototype.send = function (data) {
            if (this.readyState == WebSocket.CONNECTING) {
                throw "INVALID_STATE_ERR: Web Socket connection has not been established";
            }
            // We use encodeURIComponent() here, because FABridge doesn't work if
            // the argument includes some characters. We don't use escape() here
            // because of this:
            // https://developer.mozilla.org/en/Core_JavaScript_1.5_Guide/Functions#escape_and_unescape_Functions
            // But it looks decodeURIComponent(encodeURIComponent(s)) doesn't
            // preserve all Unicode characters either e.g. "\uffff" in Firefox.
            // Note by wtritch: Hopefully this will not be necessary using ExternalInterface.  Will require
            // additional testing.
            var result = WebSocket.__flash.send(this.__id, encodeURIComponent(data));
            if (result < 0) { // success
                return true;
            } else {
                this.bufferedAmount += result;
                return false;
            }
        };

        /**
         * Close this web socket gracefully.
         */
        WebSocket.prototype.close = function () {
            if (this.readyState == WebSocket.CLOSED || this.readyState == WebSocket.CLOSING) {
                return;
            }
            this.readyState = WebSocket.CLOSING;
            WebSocket.__flash.close(this.__id);
        };

        /**
         * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
         *
         * @param {string} type
         * @param {function} listener
         * @param {boolean} useCapture
         * @return void
         */
        WebSocket.prototype.addEventListener = function (type, listener, useCapture) {
            if (!(type in this.__events)) {
                this.__events[type] = [];
            }
            this.__events[type].push(listener);
        };

        /**
         * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
         *
         * @param {string} type
         * @param {function} listener
         * @param {boolean} useCapture
         * @return void
         */
        WebSocket.prototype.removeEventListener = function (type, listener, useCapture) {
            if (!(type in this.__events)) return;
            var events = this.__events[type];
            for (var i = events.length - 1; i >= 0; --i) {
                if (events[i] === listener) {
                    events.splice(i, 1);
                    break;
                }
            }
        };

        /**
         * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
         *
         * @param {Event} event
         * @return void
         */
        WebSocket.prototype.dispatchEvent = function (event) {
            var events = this.__events[event.type] || [];
            for (var i = 0; i < events.length; ++i) {
                events[i](event);
            }
            var handler = this["on" + event.type];
            if (handler) handler(event);
        };

        /**
         * Handles an event from Flash.
         * @param {Object} flashEvent
         */
        WebSocket.prototype.__handleEvent = function (flashEvent) {
            if ("readyState" in flashEvent) {
                this.readyState = flashEvent.readyState;
            }
            if ("protocol" in flashEvent) {
                this.protocol = flashEvent.protocol;
            }

            var jsEvent;
            if (flashEvent.type == "open" || flashEvent.type == "error") {
                jsEvent = this.__createSimpleEvent(flashEvent.type);
            } else if (flashEvent.type == "close") {
                // TODO implement jsEvent.wasClean
                jsEvent = this.__createSimpleEvent("close");
            } else if (flashEvent.type == "message") {
                var data = decodeURIComponent(flashEvent.message);
                jsEvent = this.__createMessageEvent("message", data);
            } else {
                throw "unknown event type: " + flashEvent.type;
            }

            this.dispatchEvent(jsEvent);
        };

        WebSocket.prototype.__createSimpleEvent = function (type) {
            if (document.createEvent && window.Event) {
                var event = document.createEvent("Event");
                event.initEvent(type, false, false);
                return event;
            } else {
                return {type: type, bubbles: false, cancelable: false};
            }
        };

        WebSocket.prototype.__createMessageEvent = function (type, data) {
            if (document.createEvent && window.MessageEvent && !window.opera) {
                var event = document.createEvent("MessageEvent");
                event.initMessageEvent("message", false, false, data, null, null, window, null);
                return event;
            } else {
                // IE and Opera, the latter one truncates the data parameter after any 0x00 bytes.
                return {type: type, data: data, bubbles: false, cancelable: false};
            }
        };

        /**
         * Define the WebSocket readyState enumeration.
         */
        WebSocket.CONNECTING = 0;
        WebSocket.OPEN = 1;
        WebSocket.CLOSING = 2;
        WebSocket.CLOSED = 3;

        WebSocket.__flash = null;
        WebSocket.__instances = {};
        WebSocket.__tasks = [];
        WebSocket.__nextId = 0;

        /**
         * Load a new flash security policy file.
         * @param {string} url
         */
        WebSocket.loadFlashPolicyFile = function (url) {
            WebSocket.__addTask(function () {
                WebSocket.__flash.loadManualPolicyFile(url);
            });
        };

        /**
         * Loads WebSocketMain.swf and creates WebSocketMain object in Flash.
         */
        WebSocket.__initialize = function () {
            if (WebSocket.__flash) return;

            if (WebSocket.__swfLocation) {
                // For backword compatibility.
                window.WEB_SOCKET_SWF_LOCATION = WebSocket.__swfLocation;
            }
            if (!window.WEB_SOCKET_SWF_LOCATION) {
                console.error("[WebSocket] set WEB_SOCKET_SWF_LOCATION to location of WebSocketMain.swf");
                return;
            }
            var container = document.createElement("div");
            container.id = "webSocketContainer";
            // Hides Flash box. We cannot use display: none or visibility: hidden because it prevents
            // Flash from loading at least in IE. So we move it out of the screen at (-100, -100).
            // But this even doesn't work with Flash Lite (e.g. in Droid Incredible). So with Flash
            // Lite, we put it at (0, 0). This shows 1x1 box visible at left-top corner but this is
            // the best we can do as far as we know now.
            container.style.position = "absolute";
            if (WebSocket.__isFlashLite()) {
                container.style.left = "0px";
                container.style.top = "0px";
            } else {
                container.style.left = "-100px";
                container.style.top = "-100px";
            }
            var holder = document.createElement("div");
            holder.id = "webSocketFlash";
            container.appendChild(holder);
            document.body.appendChild(container);
            // See this article for hasPriority:
            // http://help.adobe.com/en_US/as3/mobile/WS4bebcd66a74275c36cfb8137124318eebc6-7ffd.html
            swfobject.embedSWF(
                WEB_SOCKET_SWF_LOCATION,
                "webSocketFlash",
                "1" /* width */,
                "1" /* height */,
                "10.0.0" /* SWF version */,
                null,
                null,
                {hasPriority: true, swliveconnect: true, allowScriptAccess: "always"},
                null,
                function (e) {
                    if (!e.success) {
                        console.error("[WebSocket] swfobject.embedSWF failed");
                    }
                });
        };

        /**
         * Called by Flash to notify JS that it's fully loaded and ready
         * for communication.
         */
        WebSocket.__onFlashInitialized = function () {
            // We need to set a timeout here to avoid round-trip calls
            // to flash during the initialization process.
            setTimeout(function () {
                WebSocket.__flash = document.getElementById("webSocketFlash");
                WebSocket.__flash.setCallerUrl(location.href);
                WebSocket.__flash.setDebug(!!window.WEB_SOCKET_DEBUG);
                for (var i = 0; i < WebSocket.__tasks.length; ++i) {
                    WebSocket.__tasks[i]();
                }
                WebSocket.__tasks = [];
            }, 0);
        };

        /**
         * Called by Flash to notify WebSockets events are fired.
         */
        WebSocket.__onFlashEvent = function () {
            setTimeout(function () {
                try {
                    // Gets events using receiveEvents() instead of getting it from event object
                    // of Flash event. This is to make sure to keep message order.
                    // It seems sometimes Flash events don't arrive in the same order as they are sent.
                    var events = WebSocket.__flash.receiveEvents();
                    for (var i = 0; i < events.length; ++i) {
                        WebSocket.__instances[events[i].webSocketId].__handleEvent(events[i]);
                    }
                } catch (e) {
                    console.error(e);
                }
            }, 0);
            return true;
        };

        // Called by Flash.
        WebSocket.__log = function (message) {
            console.log(decodeURIComponent(message));
        };

        // Called by Flash.
        WebSocket.__error = function (message) {
            console.error(decodeURIComponent(message));
        };

        WebSocket.__addTask = function (task) {
            if (WebSocket.__flash) {
                task();
            } else {
                WebSocket.__tasks.push(task);
            }
        };

        /**
         * Test if the browser is running flash lite.
         * @return {boolean} True if flash lite is running, false otherwise.
         */
        WebSocket.__isFlashLite = function () {
            if (!window.navigator || !window.navigator.mimeTypes) {
                return false;
            }
            var mimeType = window.navigator.mimeTypes["application/x-shockwave-flash"];
            if (!mimeType || !mimeType.enabledPlugin || !mimeType.enabledPlugin.filename) {
                return false;
            }
            return mimeType.enabledPlugin.filename.match(/flashlite/i) ? true : false;
        };

        if (!window.WEB_SOCKET_DISABLE_AUTO_INITIALIZATION) {
            if (window.addEventListener) {
                window.addEventListener("load", function () {
                    WebSocket.__initialize();
                }, false);
            } else {
                window.attachEvent("onload", function () {
                    WebSocket.__initialize();
                });
            }
        }

    })();

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io, global) {

        /**
         * Expose constructor.
         *
         * @api public
         */

        exports.XHR = XHR;

        /**
         * XHR constructor
         *
         * @costructor
         * @api public
         */

        function XHR(socket) {
            if (!socket) return;

            io.Transport.apply(this, arguments);
            this.sendBuffer = [];
        };

        /**
         * Inherits from Transport.
         */

        io.util.inherit(XHR, io.Transport);

        /**
         * Establish a connection
         *
         * @returns {Transport}
         * @api public
         */

        XHR.prototype.open = function () {
            this.socket.setBuffer(false);
            this.onOpen();
            this.get();

            // we need to make sure the request succeeds since we have no indication
            // whether the request opened or not until it succeeded.
            this.setCloseTimeout();

            return this;
        };

        /**
         * Check if we need to send data to the Socket.IO server, if we have data in our
         * buffer we encode it and forward it to the `post` method.
         *
         * @api private
         */

        XHR.prototype.payload = function (payload) {
            var msgs = [];

            for (var i = 0, l = payload.length; i < l; i++) {
                msgs.push(io.parser.encodePacket(payload[i]));
            }

            this.send(io.parser.encodePayload(msgs));
        };

        /**
         * Send data to the Socket.IO server.
         *
         * @param data The message
         * @returns {Transport}
         * @api public
         */

        XHR.prototype.send = function (data) {
            this.post(data);
            return this;
        };

        /**
         * Posts a encoded message to the Socket.IO server.
         *
         * @param {String} data A encoded message.
         * @api private
         */

        function empty() {
        };

        XHR.prototype.post = function (data) {
            var self = this;
            this.socket.setBuffer(true);

            function stateChange() {
                if (this.readyState == 4) {
                    this.onreadystatechange = empty;
                    self.posting = false;

                    if (this.status == 200) {
                        self.socket.setBuffer(false);
                    } else {
                        self.onClose();
                    }
                }
            }

            function onload() {
                this.onload = empty;
                self.socket.setBuffer(false);
            };

            this.sendXHR = this.request('POST');

            if (global.XDomainRequest && this.sendXHR instanceof XDomainRequest) {
                this.sendXHR.onload = this.sendXHR.onerror = onload;
            } else {
                this.sendXHR.onreadystatechange = stateChange;
            }

            this.sendXHR.send(data);
        };

        /**
         * Disconnects the established `XHR` connection.
         *
         * @returns {Transport}
         * @api public
         */

        XHR.prototype.close = function () {
            this.onClose();
            return this;
        };

        /**
         * Generates a configured XHR request
         *
         * @param {String} url The url that needs to be requested.
         * @param {String} method The method the request should use.
         * @returns {XMLHttpRequest}
         * @api private
         */

        XHR.prototype.request = function (method) {
            var req = io.util.request(this.socket.isXDomain())
                , query = io.util.query(this.socket.options.query, 't=' + +new Date);

            req.open(method || 'GET', this.prepareUrl() + query, true);

            if (method == 'POST') {
                try {
                    if (req.setRequestHeader) {
                        req.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
                    } else {
                        // XDomainRequest
                        req.contentType = 'text/plain';
                    }
                } catch (e) {
                }
            }

            return req;
        };

        /**
         * Returns the scheme to use for the transport URLs.
         *
         * @api private
         */

        XHR.prototype.scheme = function () {
            return this.socket.options.secure ? 'https' : 'http';
        };

        /**
         * Check if the XHR transports are supported
         *
         * @param {Boolean} xdomain Check if we support cross domain requests.
         * @returns {Boolean}
         * @api public
         */

        XHR.check = function (socket, xdomain) {
            try {
                var request = io.util.request(xdomain),
                    usesXDomReq = (global.XDomainRequest && request instanceof XDomainRequest),
                    socketProtocol = (socket && socket.options && socket.options.secure ? 'https:' : 'http:'),
                    isXProtocol = (global.location && socketProtocol != global.location.protocol);
                if (request && !(usesXDomReq && isXProtocol)) {
                    return true;
                }
            } catch (e) {
            }

            return false;
        };

        /**
         * Check if the XHR transport supports cross domain requests.
         *
         * @returns {Boolean}
         * @api public
         */

        XHR.xdomainCheck = function (socket) {
            return XHR.check(socket, true);
        };

    })(
        'undefined' != typeof io ? io.Transport : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
        , this
    );
    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io) {

        /**
         * Expose constructor.
         */

        exports.htmlfile = HTMLFile;

        /**
         * The HTMLFile transport creates a `forever iframe` based transport
         * for Internet Explorer. Regular forever iframe implementations will
         * continuously trigger the browsers buzy indicators. If the forever iframe
         * is created inside a `htmlfile` these indicators will not be trigged.
         *
         * @constructor
         * @extends {io.Transport.XHR}
         * @api public
         */

        function HTMLFile(socket) {
            io.Transport.XHR.apply(this, arguments);
        };

        /**
         * Inherits from XHR transport.
         */

        io.util.inherit(HTMLFile, io.Transport.XHR);

        /**
         * Transport name
         *
         * @api public
         */

        HTMLFile.prototype.name = 'htmlfile';

        /**
         * Creates a new Ac...eX `htmlfile` with a forever loading iframe
         * that can be used to listen to messages. Inside the generated
         * `htmlfile` a reference will be made to the HTMLFile transport.
         *
         * @api private
         */

        HTMLFile.prototype.get = function () {
            this.doc = new window[(['Active'].concat('Object').join('X'))]('htmlfile');
            this.doc.open();
            this.doc.write('<html></html>');
            this.doc.close();
            this.doc.parentWindow.s = this;

            var iframeC = this.doc.createElement('div');
            iframeC.className = 'socketio';

            this.doc.body.appendChild(iframeC);
            this.iframe = this.doc.createElement('iframe');

            iframeC.appendChild(this.iframe);

            var self = this
                , query = io.util.query(this.socket.options.query, 't=' + +new Date);

            this.iframe.src = this.prepareUrl() + query;

            io.util.on(window, 'unload', function () {
                self.destroy();
            });
        };

        /**
         * The Socket.IO server will write script tags inside the forever
         * iframe, this function will be used as callback for the incoming
         * information.
         *
         * @param {String} data The message
         * @param {document} doc Reference to the context
         * @api private
         */

        HTMLFile.prototype._ = function (data, doc) {
            // unescape all forward slashes. see GH-1251
            data = data.replace(/\\\//g, '/');
            this.onData(data);
            try {
                var script = doc.getElementsByTagName('script')[0];
                script.parentNode.removeChild(script);
            } catch (e) {
            }
        };

        /**
         * Destroy the established connection, iframe and `htmlfile`.
         * And calls the `CollectGarbage` function of Internet Explorer
         * to release the memory.
         *
         * @api private
         */

        HTMLFile.prototype.destroy = function () {
            if (this.iframe) {
                try {
                    this.iframe.src = 'about:blank';
                } catch (e) {
                }

                this.doc = null;
                this.iframe.parentNode.removeChild(this.iframe);
                this.iframe = null;

                CollectGarbage();
            }
        };

        /**
         * Disconnects the established connection.
         *
         * @returns {Transport} Chaining.
         * @api public
         */

        HTMLFile.prototype.close = function () {
            this.destroy();
            return io.Transport.XHR.prototype.close.call(this);
        };

        /**
         * Checks if the browser supports this transport. The browser
         * must have an `Ac...eXObject` implementation.
         *
         * @return {Boolean}
         * @api public
         */

        HTMLFile.check = function (socket) {
            if (typeof window != "undefined" && (['Active'].concat('Object').join('X')) in window) {
                try {
                    var a = new window[(['Active'].concat('Object').join('X'))]('htmlfile');
                    return a && io.Transport.XHR.check(socket);
                } catch (e) {
                }
            }
            return false;
        };

        /**
         * Check if cross domain requests are supported.
         *
         * @returns {Boolean}
         * @api public
         */

        HTMLFile.xdomainCheck = function () {
            // we can probably do handling for sub-domains, we should
            // test that it's cross domain but a subdomain here
            return false;
        };

        /**
         * Add the transport to your public io.transports array.
         *
         * @api private
         */

        io.transports.push('htmlfile');

    })(
        'undefined' != typeof io ? io.Transport : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
    );

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io, global) {

        /**
         * Expose constructor.
         */

        exports['xhr-polling'] = XHRPolling;

        /**
         * The XHR-polling transport uses long polling XHR requests to create a
         * "persistent" connection with the server.
         *
         * @constructor
         * @api public
         */

        function XHRPolling() {
            io.Transport.XHR.apply(this, arguments);
        };

        /**
         * Inherits from XHR transport.
         */

        io.util.inherit(XHRPolling, io.Transport.XHR);

        /**
         * Merge the properties from XHR transport
         */

        io.util.merge(XHRPolling, io.Transport.XHR);

        /**
         * Transport name
         *
         * @api public
         */

        XHRPolling.prototype.name = 'xhr-polling';

        /**
         * Indicates whether heartbeats is enabled for this transport
         *
         * @api private
         */

        XHRPolling.prototype.heartbeats = function () {
            return false;
        };

        /**
         * Establish a connection, for iPhone and Android this will be done once the page
         * is loaded.
         *
         * @returns {Transport} Chaining.
         * @api public
         */

        XHRPolling.prototype.open = function () {
            var self = this;

            io.Transport.XHR.prototype.open.call(self);
            return false;
        };

        /**
         * Starts a XHR request to wait for incoming messages.
         *
         * @api private
         */

        function empty() {
        };

        XHRPolling.prototype.get = function () {
            if (!this.isOpen) return;

            var self = this;

            function stateChange() {
                if (this.readyState == 4) {
                    this.onreadystatechange = empty;

                    if (this.status == 200) {
                        self.onData(this.responseText);
                        self.get();
                    } else {
                        self.onClose();
                    }
                }
            };

            function onload() {
                this.onload = empty;
                this.onerror = empty;
                self.retryCounter = 1;
                self.onData(this.responseText);
                self.get();
            };

            function onerror() {
                self.retryCounter++;
                if (!self.retryCounter || self.retryCounter > 3) {
                    self.onClose();
                } else {
                    self.get();
                }
            };

            this.xhr = this.request();

            if (global.XDomainRequest && this.xhr instanceof XDomainRequest) {
                this.xhr.onload = onload;
                this.xhr.onerror = onerror;
            } else {
                this.xhr.onreadystatechange = stateChange;
            }

            this.xhr.send(null);
        };

        /**
         * Handle the unclean close behavior.
         *
         * @api private
         */

        XHRPolling.prototype.onClose = function () {
            io.Transport.XHR.prototype.onClose.call(this);

            if (this.xhr) {
                this.xhr.onreadystatechange = this.xhr.onload = this.xhr.onerror = empty;
                try {
                    this.xhr.abort();
                } catch (e) {
                }
                this.xhr = null;
            }
        };

        /**
         * Webkit based browsers show a infinit spinner when you start a XHR request
         * before the browsers onload event is called so we need to defer opening of
         * the transport until the onload event is called. Wrapping the cb in our
         * defer method solve this.
         *
         * @param {Socket} socket The socket instance that needs a transport
         * @param {Function} fn The callback
         * @api private
         */

        XHRPolling.prototype.ready = function (socket, fn) {
            var self = this;

            io.util.defer(function () {
                fn.call(self);
            });
        };

        /**
         * Add the transport to your public io.transports array.
         *
         * @api private
         */

        io.transports.push('xhr-polling');

    })(
        'undefined' != typeof io ? io.Transport : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
        , this
    );

    /**
     * socket.io
     * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
     * MIT Licensed
     */

    (function (exports, io, global) {
        /**
         * There is a way to hide the loading indicator in Firefox. If you create and
         * remove a iframe it will stop showing the current loading indicator.
         * Unfortunately we can't feature detect that and UA sniffing is evil.
         *
         * @api private
         */

        var indicator = global.document && "MozAppearance" in
            global.document.documentElement.style;

        /**
         * Expose constructor.
         */

        exports['jsonp-polling'] = JSONPPolling;

        /**
         * The JSONP transport creates an persistent connection by dynamically
         * inserting a script tag in the page. This script tag will receive the
         * information of the Socket.IO server. When new information is received
         * it creates a new script tag for the new data stream.
         *
         * @constructor
         * @extends {io.Transport.xhr-polling}
         * @api public
         */

        function JSONPPolling(socket) {
            io.Transport['xhr-polling'].apply(this, arguments);

            this.index = io.j.length;

            var self = this;

            io.j.push(function (msg) {
                self._(msg);
            });
        };

        /**
         * Inherits from XHR polling transport.
         */

        io.util.inherit(JSONPPolling, io.Transport['xhr-polling']);

        /**
         * Transport name
         *
         * @api public
         */

        JSONPPolling.prototype.name = 'jsonp-polling';

        /**
         * Posts a encoded message to the Socket.IO server using an iframe.
         * The iframe is used because script tags can create POST based requests.
         * The iframe is positioned outside of the view so the user does not
         * notice it's existence.
         *
         * @param {String} data A encoded message.
         * @api private
         */

        JSONPPolling.prototype.post = function (data) {
            var self = this
                , query = io.util.query(
                this.socket.options.query
                , 't=' + (+new Date) + '&i=' + this.index
            );

            if (!this.form) {
                var form = document.createElement('form')
                    , area = document.createElement('textarea')
                    , id = this.iframeId = 'socketio_iframe_' + this.index
                    , iframe;

                form.className = 'socketio';
                form.style.position = 'absolute';
                form.style.top = '0px';
                form.style.left = '0px';
                form.style.display = 'none';
                form.target = id;
                form.method = 'POST';
                form.setAttribute('accept-charset', 'utf-8');
                area.name = 'd';
                form.appendChild(area);
                document.body.appendChild(form);

                this.form = form;
                this.area = area;
            }

            this.form.action = this.prepareUrl() + query;

            function complete() {
                initIframe();
                self.socket.setBuffer(false);
            };

            function initIframe() {
                if (self.iframe) {
                    self.form.removeChild(self.iframe);
                }

                try {
                    // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
                    iframe = document.createElement('<iframe name="' + self.iframeId + '">');
                } catch (e) {
                    iframe = document.createElement('iframe');
                    iframe.name = self.iframeId;
                }

                iframe.id = self.iframeId;

                self.form.appendChild(iframe);
                self.iframe = iframe;
            };

            initIframe();

            // we temporarily stringify until we figure out how to prevent
            // browsers from turning `\n` into `\r\n` in form inputs
            this.area.value = io.JSON.stringify(data);

            try {
                this.form.submit();
            } catch (e) {
            }

            if (this.iframe.attachEvent) {
                iframe.onreadystatechange = function () {
                    if (self.iframe.readyState == 'complete') {
                        complete();
                    }
                };
            } else {
                this.iframe.onload = complete;
            }

            this.socket.setBuffer(true);
        };

        /**
         * Creates a new JSONP poll that can be used to listen
         * for messages from the Socket.IO server.
         *
         * @api private
         */

        JSONPPolling.prototype.get = function () {
            var self = this
                , script = document.createElement('script')
                , query = io.util.query(
                this.socket.options.query
                , 't=' + (+new Date) + '&i=' + this.index
            );

            if (this.script) {
                this.script.parentNode.removeChild(this.script);
                this.script = null;
            }

            script.async = true;
            script.src = this.prepareUrl() + query;
            script.onerror = function () {
                self.onClose();
            };

            var insertAt = document.getElementsByTagName('script')[0];
            insertAt.parentNode.insertBefore(script, insertAt);
            this.script = script;

            if (indicator) {
                setTimeout(function () {
                    var iframe = document.createElement('iframe');
                    document.body.appendChild(iframe);
                    document.body.removeChild(iframe);
                }, 100);
            }
        };

        /**
         * Callback function for the incoming message stream from the Socket.IO server.
         *
         * @param {String} data The message
         * @api private
         */

        JSONPPolling.prototype._ = function (msg) {
            this.onData(msg);
            if (this.isOpen) {
                this.get();
            }
            return this;
        };

        /**
         * The indicator hack only works after onload
         *
         * @param {Socket} socket The socket instance that needs a transport
         * @param {Function} fn The callback
         * @api private
         */

        JSONPPolling.prototype.ready = function (socket, fn) {
            var self = this;
            if (!indicator) return fn.call(this);

            io.util.load(function () {
                fn.call(self);
            });
        };

        /**
         * Checks if browser supports this transport.
         *
         * @return {Boolean}
         * @api public
         */

        JSONPPolling.check = function () {
            return 'document' in global;
        };

        /**
         * Check if cross domain requests are supported
         *
         * @returns {Boolean}
         * @api public
         */

        JSONPPolling.xdomainCheck = function () {
            return true;
        };

        /**
         * Add the transport to your public io.transports array.
         *
         * @api private
         */

        io.transports.push('jsonp-polling');

    })(
        'undefined' != typeof io ? io.Transport : module.exports
        , 'undefined' != typeof io ? io : module.parent.exports
        , this
    );

    if (typeof define === "function" && define.amd) {
        define([], function () {
            return io;
        });
    }
})();