diff -r 322d0feea350 -r 89ef5ed3c48b src/cm/media/js/lib/yui/yui_3.10.3/build/io-base/io-base.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/media/js/lib/yui/yui_3.10.3/build/io-base/io-base.js	Tue Jul 16 14:29:46 2013 +0200
@@ -0,0 +1,1015 @@
+/*
+YUI 3.10.3 (build 2fb5187)
+Copyright 2013 Yahoo! Inc. All rights reserved.
+Licensed under the BSD License.
+http://yuilibrary.com/license/
+*/
+
+YUI.add('io-base', function (Y, NAME) {
+
+/**
+Base IO functionality. Provides basic XHR transport support.
+
+@module io
+@submodule io-base
+@for IO
+**/
+
+var // List of events that comprise the IO event lifecycle.
+    EVENTS = ['start', 'complete', 'end', 'success', 'failure', 'progress'],
+
+    // Whitelist of used XHR response object properties.
+    XHR_PROPS = ['status', 'statusText', 'responseText', 'responseXML'],
+
+    win = Y.config.win,
+    uid = 0;
+
+/**
+The IO class is a utility that brokers HTTP requests through a simplified
+interface.  Specifically, it allows JavaScript to make HTTP requests to
+a resource without a page reload.  The underlying transport for making
+same-domain requests is the XMLHttpRequest object.  IO can also use
+Flash, if specified as a transport, for cross-domain requests.
+
+@class IO
+@constructor
+@param {Object} config Object of EventTarget's publish method configurations
+                    used to configure IO's events.
+**/
+function IO (config) {
+    var io = this;
+
+    io._uid = 'io:' + uid++;
+    io._init(config);
+    Y.io._map[io._uid] = io;
+}
+
+IO.prototype = {
+    //--------------------------------------
+    //  Properties
+    //--------------------------------------
+
+   /**
+    * A counter that increments for each transaction.
+    *
+    * @property _id
+    * @private
+    * @type {Number}
+    */
+    _id: 0,
+
+   /**
+    * Object of IO HTTP headers sent with each transaction.
+    *
+    * @property _headers
+    * @private
+    * @type {Object}
+    */
+    _headers: {
+        'X-Requested-With' : 'XMLHttpRequest'
+    },
+
+   /**
+    * Object that stores timeout values for any transaction with a defined
+    * "timeout" configuration property.
+    *
+    * @property _timeout
+    * @private
+    * @type {Object}
+    */
+    _timeout: {},
+
+    //--------------------------------------
+    //  Methods
+    //--------------------------------------
+
+    _init: function(config) {
+        var io = this, i, len;
+
+        io.cfg = config || {};
+
+        Y.augment(io, Y.EventTarget);
+        for (i = 0, len = EVENTS.length; i < len; ++i) {
+            // Publish IO global events with configurations, if any.
+            // IO global events are set to broadcast by default.
+            // These events use the "io:" namespace.
+            io.publish('io:' + EVENTS[i], Y.merge({ broadcast: 1 }, config));
+            // Publish IO transaction events with configurations, if
+            // any.  These events use the "io-trn:" namespace.
+            io.publish('io-trn:' + EVENTS[i], config);
+        }
+    },
+
+   /**
+    * Method that creates a unique transaction object for each request.
+    *
+    * @method _create
+    * @private
+    * @param {Object} cfg Configuration object subset to determine if
+    *                 the transaction is an XDR or file upload,
+    *                 requiring an alternate transport.
+    * @param {Number} id Transaction id
+    * @return {Object} The transaction object
+    */
+    _create: function(config, id) {
+        var io = this,
+            transaction = {
+                id : Y.Lang.isNumber(id) ? id : io._id++,
+                uid: io._uid
+            },
+            alt = config.xdr ? config.xdr.use : null,
+            form = config.form && config.form.upload ? 'iframe' : null,
+            use;
+
+        if (alt === 'native') {
+            // Non-IE and IE >= 10  can use XHR level 2 and not rely on an
+            // external transport.
+            alt = Y.UA.ie && !SUPPORTS_CORS ? 'xdr' : null;
+
+            // Prevent "pre-flight" OPTIONS request by removing the
+            // `X-Requested-With` HTTP header from CORS requests. This header
+            // can be added back on a per-request basis, if desired.
+            io.setHeader('X-Requested-With');
+        }
+
+        use = alt || form;
+        transaction = use ? Y.merge(Y.IO.customTransport(use), transaction) :
+                            Y.merge(Y.IO.defaultTransport(), transaction);
+
+        if (transaction.notify) {
+            config.notify = function (e, t, c) { io.notify(e, t, c); };
+        }
+
+        if (!use) {
+            if (win && win.FormData && config.data instanceof win.FormData) {
+                transaction.c.upload.onprogress = function (e) {
+                    io.progress(transaction, e, config);
+                };
+                transaction.c.onload = function (e) {
+                    io.load(transaction, e, config);
+                };
+                transaction.c.onerror = function (e) {
+                    io.error(transaction, e, config);
+                };
+                transaction.upload = true;
+            }
+        }
+
+        return transaction;
+    },
+
+    _destroy: function(transaction) {
+        if (win && !transaction.notify && !transaction.xdr) {
+            if (XHR && !transaction.upload) {
+                transaction.c.onreadystatechange = null;
+            } else if (transaction.upload) {
+                transaction.c.upload.onprogress = null;
+                transaction.c.onload = null;
+                transaction.c.onerror = null;
+            } else if (Y.UA.ie && !transaction.e) {
+                // IE, when using XMLHttpRequest as an ActiveX Object, will throw
+                // a "Type Mismatch" error if the event handler is set to "null".
+                transaction.c.abort();
+            }
+        }
+
+        transaction = transaction.c = null;
+    },
+
+   /**
+    * Method for creating and firing events.
+    *
+    * @method _evt
+    * @private
+    * @param {String} eventName Event to be published.
+    * @param {Object} transaction Transaction object.
+    * @param {Object} config Configuration data subset for event subscription.
+    */
+    _evt: function(eventName, transaction, config) {
+        var io          = this, params,
+            args        = config['arguments'],
+            emitFacade  = io.cfg.emitFacade,
+            globalEvent = "io:" + eventName,
+            trnEvent    = "io-trn:" + eventName;
+
+        // Workaround for #2532107
+        this.detach(trnEvent);
+
+        if (transaction.e) {
+            transaction.c = { status: 0, statusText: transaction.e };
+        }
+
+        // Fire event with parameters or an Event Facade.
+        params = [ emitFacade ?
+            {
+                id: transaction.id,
+                data: transaction.c,
+                cfg: config,
+                'arguments': args
+            } :
+            transaction.id
+        ];
+
+        if (!emitFacade) {
+            if (eventName === EVENTS[0] || eventName === EVENTS[2]) {
+                if (args) {
+                    params.push(args);
+                }
+            } else {
+                if (transaction.evt) {
+                    params.push(transaction.evt);
+                } else {
+                    params.push(transaction.c);
+                }
+                if (args) {
+                    params.push(args);
+                }
+            }
+        }
+
+        params.unshift(globalEvent);
+        // Fire global events.
+        io.fire.apply(io, params);
+        // Fire transaction events, if receivers are defined.
+        if (config.on) {
+            params[0] = trnEvent;
+            io.once(trnEvent, config.on[eventName], config.context || Y);
+            io.fire.apply(io, params);
+        }
+    },
+
+   /**
+    * Fires event "io:start" and creates, fires a transaction-specific
+    * start event, if `config.on.start` is defined.
+    *
+    * @method start
+    * @param {Object} transaction Transaction object.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    start: function(transaction, config) {
+       /**
+        * Signals the start of an IO request.
+        * @event io:start
+        */
+        this._evt(EVENTS[0], transaction, config);
+    },
+
+   /**
+    * Fires event "io:complete" and creates, fires a
+    * transaction-specific "complete" event, if config.on.complete is
+    * defined.
+    *
+    * @method complete
+    * @param {Object} transaction Transaction object.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    complete: function(transaction, config) {
+       /**
+        * Signals the completion of the request-response phase of a
+        * transaction. Response status and data are accessible, if
+        * available, in this event.
+        * @event io:complete
+        */
+        this._evt(EVENTS[1], transaction, config);
+    },
+
+   /**
+    * Fires event "io:end" and creates, fires a transaction-specific "end"
+    * event, if config.on.end is defined.
+    *
+    * @method end
+    * @param {Object} transaction Transaction object.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    end: function(transaction, config) {
+       /**
+        * Signals the end of the transaction lifecycle.
+        * @event io:end
+        */
+        this._evt(EVENTS[2], transaction, config);
+        this._destroy(transaction);
+    },
+
+   /**
+    * Fires event "io:success" and creates, fires a transaction-specific
+    * "success" event, if config.on.success is defined.
+    *
+    * @method success
+    * @param {Object} transaction Transaction object.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    success: function(transaction, config) {
+       /**
+        * Signals an HTTP response with status in the 2xx range.
+        * Fires after io:complete.
+        * @event io:success
+        */
+        this._evt(EVENTS[3], transaction, config);
+        this.end(transaction, config);
+    },
+
+   /**
+    * Fires event "io:failure" and creates, fires a transaction-specific
+    * "failure" event, if config.on.failure is defined.
+    *
+    * @method failure
+    * @param {Object} transaction Transaction object.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    failure: function(transaction, config) {
+       /**
+        * Signals an HTTP response with status outside of the 2xx range.
+        * Fires after io:complete.
+        * @event io:failure
+        */
+        this._evt(EVENTS[4], transaction, config);
+        this.end(transaction, config);
+    },
+
+   /**
+    * Fires event "io:progress" and creates, fires a transaction-specific
+    * "progress" event -- for XMLHttpRequest file upload -- if
+    * config.on.progress is defined.
+    *
+    * @method progress
+    * @param {Object} transaction Transaction object.
+    * @param {Object} progress event.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    progress: function(transaction, e, config) {
+       /**
+        * Signals the interactive state during a file upload transaction.
+        * This event fires after io:start and before io:complete.
+        * @event io:progress
+        */
+        transaction.evt = e;
+        this._evt(EVENTS[5], transaction, config);
+    },
+
+   /**
+    * Fires event "io:complete" and creates, fires a transaction-specific
+    * "complete" event -- for XMLHttpRequest file upload -- if
+    * config.on.complete is defined.
+    *
+    * @method load
+    * @param {Object} transaction Transaction object.
+    * @param {Object} load event.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    load: function (transaction, e, config) {
+        transaction.evt = e.target;
+        this._evt(EVENTS[1], transaction, config);
+    },
+
+   /**
+    * Fires event "io:failure" and creates, fires a transaction-specific
+    * "failure" event -- for XMLHttpRequest file upload -- if
+    * config.on.failure is defined.
+    *
+    * @method error
+    * @param {Object} transaction Transaction object.
+    * @param {Object} error event.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    error: function (transaction, e, config) {
+        transaction.evt = e;
+        this._evt(EVENTS[4], transaction, config);
+    },
+
+   /**
+    * Retry an XDR transaction, using the Flash tranport, if the native
+    * transport fails.
+    *
+    * @method _retry
+    * @private
+    * @param {Object} transaction Transaction object.
+    * @param {String} uri Qualified path to transaction resource.
+    * @param {Object} config Configuration object for the transaction.
+    */
+    _retry: function(transaction, uri, config) {
+        this._destroy(transaction);
+        config.xdr.use = 'flash';
+        return this.send(uri, config, transaction.id);
+    },
+
+   /**
+    * Method that concatenates string data for HTTP GET transactions.
+    *
+    * @method _concat
+    * @private
+    * @param {String} uri URI or root data.
+    * @param {String} data Data to be concatenated onto URI.
+    * @return {String}
+    */
+    _concat: function(uri, data) {
+        uri += (uri.indexOf('?') === -1 ? '?' : '&') + data;
+        return uri;
+    },
+
+   /**
+    * Stores default client headers for all transactions. If a label is
+    * passed with no value argument, the header will be deleted.
+    *
+    * @method setHeader
+    * @param {String} name HTTP header
+    * @param {String} value HTTP header value
+    */
+    setHeader: function(name, value) {
+        if (value) {
+            this._headers[name] = value;
+        } else {
+            delete this._headers[name];
+        }
+    },
+
+   /**
+    * Method that sets all HTTP headers to be sent in a transaction.
+    *
+    * @method _setHeaders
+    * @private
+    * @param {Object} transaction - XHR instance for the specific transaction.
+    * @param {Object} headers - HTTP headers for the specific transaction, as
+    *                    defined in the configuration object passed to YUI.io().
+    */
+    _setHeaders: function(transaction, headers) {
+        headers = Y.merge(this._headers, headers);
+        Y.Object.each(headers, function(value, name) {
+            if (value !== 'disable') {
+                transaction.setRequestHeader(name, headers[name]);
+            }
+        });
+    },
+
+   /**
+    * Starts timeout count if the configuration object has a defined
+    * timeout property.
+    *
+    * @method _startTimeout
+    * @private
+    * @param {Object} transaction Transaction object generated by _create().
+    * @param {Object} timeout Timeout in milliseconds.
+    */
+    _startTimeout: function(transaction, timeout) {
+        var io = this;
+
+        io._timeout[transaction.id] = setTimeout(function() {
+            io._abort(transaction, 'timeout');
+        }, timeout);
+    },
+
+   /**
+    * Clears the timeout interval started by _startTimeout().
+    *
+    * @method _clearTimeout
+    * @private
+    * @param {Number} id - Transaction id.
+    */
+    _clearTimeout: function(id) {
+        clearTimeout(this._timeout[id]);
+        delete this._timeout[id];
+    },
+
+   /**
+    * Method that determines if a transaction response qualifies as success
+    * or failure, based on the response HTTP status code, and fires the
+    * appropriate success or failure events.
+    *
+    * @method _result
+    * @private
+    * @static
+    * @param {Object} transaction Transaction object generated by _create().
+    * @param {Object} config Configuration object passed to io().
+    */
+    _result: function(transaction, config) {
+        var status;
+        // Firefox will throw an exception if attempting to access
+        // an XHR object's status property, after a request is aborted.
+        try {
+            status = transaction.c.status;
+        } catch(e) {
+            status = 0;
+        }
+
+        // IE reports HTTP 204 as HTTP 1223.
+        if (status >= 200 && status < 300 || status === 304 || status === 1223) {
+            this.success(transaction, config);
+        } else {
+            this.failure(transaction, config);
+        }
+    },
+
+   /**
+    * Event handler bound to onreadystatechange.
+    *
+    * @method _rS
+    * @private
+    * @param {Object} transaction Transaction object generated by _create().
+    * @param {Object} config Configuration object passed to YUI.io().
+    */
+    _rS: function(transaction, config) {
+        var io = this;
+
+        if (transaction.c.readyState === 4) {
+            if (config.timeout) {
+                io._clearTimeout(transaction.id);
+            }
+
+            // Yield in the event of request timeout or abort.
+            setTimeout(function() {
+                io.complete(transaction, config);
+                io._result(transaction, config);
+            }, 0);
+        }
+    },
+
+   /**
+    * Terminates a transaction due to an explicit abort or timeout.
+    *
+    * @method _abort
+    * @private
+    * @param {Object} transaction Transaction object generated by _create().
+    * @param {String} type Identifies timed out or aborted transaction.
+    */
+    _abort: function(transaction, type) {
+        if (transaction && transaction.c) {
+            transaction.e = type;
+            transaction.c.abort();
+        }
+    },
+
+   /**
+    * Requests a transaction. `send()` is implemented as `Y.io()`.  Each
+    * transaction may include a configuration object.  Its properties are:
+    *
+    * <dl>
+    *   <dt>method</dt>
+    *     <dd>HTTP method verb (e.g., GET or POST). If this property is not
+    *         not defined, the default value will be GET.</dd>
+    *
+    *   <dt>data</dt>
+    *     <dd>This is the name-value string that will be sent as the
+    *     transaction data. If the request is HTTP GET, the data become
+    *     part of querystring. If HTTP POST, the data are sent in the
+    *     message body.</dd>
+    *
+    *   <dt>xdr</dt>
+    *     <dd>Defines the transport to be used for cross-domain requests.
+    *     By setting this property, the transaction will use the specified
+    *     transport instead of XMLHttpRequest. The properties of the
+    *     transport object are:
+    *     <dl>
+    *       <dt>use</dt>
+    *         <dd>The transport to be used: 'flash' or 'native'</dd>
+    *       <dt>dataType</dt>
+    *         <dd>Set the value to 'XML' if that is the expected response
+    *         content type.</dd>
+    *       <dt>credentials</dt>
+    *         <dd>Set the value to 'true' to set XHR.withCredentials property to true.</dd>
+    *     </dl></dd>
+    *
+    *   <dt>form</dt>
+    *     <dd>Form serialization configuration object.  Its properties are:
+    *     <dl>
+    *       <dt>id</dt>
+    *         <dd>Node object or id of HTML form</dd>
+    *       <dt>useDisabled</dt>
+    *         <dd>`true` to also serialize disabled form field values
+    *         (defaults to `false`)</dd>
+    *     </dl></dd>
+    *
+    *   <dt>on</dt>
+    *     <dd>Assigns transaction event subscriptions. Available events are:
+    *     <dl>
+    *       <dt>start</dt>
+    *         <dd>Fires when a request is sent to a resource.</dd>
+    *       <dt>complete</dt>
+    *         <dd>Fires when the transaction is complete.</dd>
+    *       <dt>success</dt>
+    *         <dd>Fires when the HTTP response status is within the 2xx
+    *         range.</dd>
+    *       <dt>failure</dt>
+    *         <dd>Fires when the HTTP response status is outside the 2xx
+    *         range, if an exception occurs, if the transation is aborted,
+    *         or if the transaction exceeds a configured `timeout`.</dd>
+    *       <dt>end</dt>
+    *         <dd>Fires at the conclusion of the transaction
+    *            lifecycle, after `success` or `failure`.</dd>
+    *     </dl>
+    *
+    *     <p>Callback functions for `start` and `end` receive the id of the
+    *     transaction as a first argument. For `complete`, `success`, and
+    *     `failure`, callbacks receive the id and the response object
+    *     (usually the XMLHttpRequest instance).  If the `arguments`
+    *     property was included in the configuration object passed to
+    *     `Y.io()`, the configured data will be passed to all callbacks as
+    *     the last argument.</p>
+    *     </dd>
+    *
+    *   <dt>sync</dt>
+    *     <dd>Pass `true` to make a same-domain transaction synchronous.
+    *     <strong>CAVEAT</strong>: This will negatively impact the user
+    *     experience. Have a <em>very</em> good reason if you intend to use
+    *     this.</dd>
+    *
+    *   <dt>context</dt>
+    *     <dd>The "`this'" object for all configured event handlers. If a
+    *     specific context is needed for individual callbacks, bind the
+    *     callback to a context using `Y.bind()`.</dd>
+    *
+    *   <dt>headers</dt>
+    *     <dd>Object map of transaction headers to send to the server. The
+    *     object keys are the header names and the values are the header
+    *     values.</dd>
+    *
+    *   <dt>timeout</dt>
+    *     <dd>Millisecond threshold for the transaction before being
+    *     automatically aborted.</dd>
+    *
+    *   <dt>arguments</dt>
+    *     <dd>User-defined data passed to all registered event handlers.
+    *     This value is available as the second argument in the "start" and
+    *     "end" event handlers. It is the third argument in the "complete",
+    *     "success", and "failure" event handlers. <strong>Be sure to quote
+    *     this property name in the transaction configuration as
+    *     "arguments" is a reserved word in JavaScript</strong> (e.g.
+    *     `Y.io({ ..., "arguments": stuff })`).</dd>
+    * </dl>
+    *
+    * @method send
+    * @public
+    * @param {String} uri Qualified path to transaction resource.
+    * @param {Object} config Configuration object for the transaction.
+    * @param {Number} id Transaction id, if already set.
+    * @return {Object}
+    */
+    send: function(uri, config, id) {
+        var transaction, method, i, len, sync, data,
+            io = this,
+            u = uri,
+            response = {};
+
+        config = config ? Y.Object(config) : {};
+        transaction = io._create(config, id);
+        method = config.method ? config.method.toUpperCase() : 'GET';
+        sync = config.sync;
+        data = config.data;
+
+        // Serialize a map object into a key-value string using
+        // querystring-stringify-simple.
+        if ((Y.Lang.isObject(data) && !data.nodeType) && !transaction.upload) {
+            if (Y.QueryString && Y.QueryString.stringify) {
+                config.data = data = Y.QueryString.stringify(data);
+            } else {
+            }
+        }
+
+        if (config.form) {
+            if (config.form.upload) {
+                // This is a file upload transaction, calling
+                // upload() in io-upload-iframe.
+                return io.upload(transaction, uri, config);
+            } else {
+                // Serialize HTML form data into a key-value string.
+                data = io._serialize(config.form, data);
+            }
+        }
+
+        // Convert falsy values to an empty string. This way IE can't be
+        // rediculous and translate `undefined` to "undefined".
+        data || (data = '');
+
+        if (data) {
+            switch (method) {
+                case 'GET':
+                case 'HEAD':
+                case 'DELETE':
+                    u = io._concat(u, data);
+                    data = '';
+                    break;
+                case 'POST':
+                case 'PUT':
+                    // If Content-Type is defined in the configuration object, or
+                    // or as a default header, it will be used instead of
+                    // 'application/x-www-form-urlencoded; charset=UTF-8'
+                    config.headers = Y.merge({
+                        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
+                    }, config.headers);
+                    break;
+            }
+        }
+
+        if (transaction.xdr) {
+            // Route data to io-xdr module for flash and XDomainRequest.
+            return io.xdr(u, transaction, config);
+        }
+        else if (transaction.notify) {
+            // Route data to custom transport
+            return transaction.c.send(transaction, uri, config);
+        }
+
+        if (!sync && !transaction.upload) {
+            transaction.c.onreadystatechange = function() {
+                io._rS(transaction, config);
+            };
+        }
+
+        try {
+            // Determine if request is to be set as
+            // synchronous or asynchronous.
+            transaction.c.open(method, u, !sync, config.username || null, config.password || null);
+            io._setHeaders(transaction.c, config.headers || {});
+            io.start(transaction, config);
+
+            // Will work only in browsers that implement the
+            // Cross-Origin Resource Sharing draft.
+            if (config.xdr && config.xdr.credentials && SUPPORTS_CORS) {
+                transaction.c.withCredentials = true;
+            }
+
+            // Using "null" with HTTP POST will result in a request
+            // with no Content-Length header defined.
+            transaction.c.send(data);
+
+            if (sync) {
+                // Create a response object for synchronous transactions,
+                // mixing id and arguments properties with the xhr
+                // properties whitelist.
+                for (i = 0, len = XHR_PROPS.length; i < len; ++i) {
+                    response[XHR_PROPS[i]] = transaction.c[XHR_PROPS[i]];
+                }
+
+                response.getAllResponseHeaders = function() {
+                    return transaction.c.getAllResponseHeaders();
+                };
+
+                response.getResponseHeader = function(name) {
+                    return transaction.c.getResponseHeader(name);
+                };
+
+                io.complete(transaction, config);
+                io._result(transaction, config);
+
+                return response;
+            }
+        } catch(e) {
+            if (transaction.xdr) {
+                // This exception is usually thrown by browsers
+                // that do not support XMLHttpRequest Level 2.
+                // Retry the request with the XDR transport set
+                // to 'flash'.  If the Flash transport is not
+                // initialized or available, the transaction
+                // will resolve to a transport error.
+                return io._retry(transaction, uri, config);
+            } else {
+                io.complete(transaction, config);
+                io._result(transaction, config);
+            }
+        }
+
+        // If config.timeout is defined, and the request is standard XHR,
+        // initialize timeout polling.
+        if (config.timeout) {
+            io._startTimeout(transaction, config.timeout);
+        }
+
+        return {
+            id: transaction.id,
+            abort: function() {
+                return transaction.c ? io._abort(transaction, 'abort') : false;
+            },
+            isInProgress: function() {
+                return transaction.c ? (transaction.c.readyState % 4) : false;
+            },
+            io: io
+        };
+    }
+};
+
+/**
+Method for initiating an ajax call.  The first argument is the url end
+point for the call.  The second argument is an object to configure the
+transaction and attach event subscriptions.  The configuration object
+supports the following properties:
+
+<dl>
+  <dt>method</dt>
+    <dd>HTTP method verb (e.g., GET or POST). If this property is not
+        not defined, the default value will be GET.</dd>
+
+  <dt>data</dt>
+    <dd>This is the name-value string that will be sent as the
+    transaction data. If the request is HTTP GET, the data become
+    part of querystring. If HTTP POST, the data are sent in the
+    message body.</dd>
+
+  <dt>xdr</dt>
+    <dd>Defines the transport to be used for cross-domain requests.
+    By setting this property, the transaction will use the specified
+    transport instead of XMLHttpRequest. The properties of the
+    transport object are:
+    <dl>
+      <dt>use</dt>
+        <dd>The transport to be used: 'flash' or 'native'</dd>
+      <dt>dataType</dt>
+        <dd>Set the value to 'XML' if that is the expected response
+        content type.</dd>
+    </dl></dd>
+
+  <dt>form</dt>
+    <dd>Form serialization configuration object.  Its properties are:
+    <dl>
+      <dt>id</dt>
+        <dd>Node object or id of HTML form</dd>
+      <dt>useDisabled</dt>
+        <dd>`true` to also serialize disabled form field values
+        (defaults to `false`)</dd>
+    </dl></dd>
+
+  <dt>on</dt>
+    <dd>Assigns transaction event subscriptions. Available events are:
+    <dl>
+      <dt>start</dt>
+        <dd>Fires when a request is sent to a resource.</dd>
+      <dt>complete</dt>
+        <dd>Fires when the transaction is complete.</dd>
+      <dt>success</dt>
+        <dd>Fires when the HTTP response status is within the 2xx
+        range.</dd>
+      <dt>failure</dt>
+        <dd>Fires when the HTTP response status is outside the 2xx
+        range, if an exception occurs, if the transation is aborted,
+        or if the transaction exceeds a configured `timeout`.</dd>
+      <dt>end</dt>
+        <dd>Fires at the conclusion of the transaction
+           lifecycle, after `success` or `failure`.</dd>
+    </dl>
+
+    <p>Callback functions for `start` and `end` receive the id of the
+    transaction as a first argument. For `complete`, `success`, and
+    `failure`, callbacks receive the id and the response object
+    (usually the XMLHttpRequest instance).  If the `arguments`
+    property was included in the configuration object passed to
+    `Y.io()`, the configured data will be passed to all callbacks as
+    the last argument.</p>
+    </dd>
+
+  <dt>sync</dt>
+    <dd>Pass `true` to make a same-domain transaction synchronous.
+    <strong>CAVEAT</strong>: This will negatively impact the user
+    experience. Have a <em>very</em> good reason if you intend to use
+    this.</dd>
+
+  <dt>context</dt>
+    <dd>The "`this'" object for all configured event handlers. If a
+    specific context is needed for individual callbacks, bind the
+    callback to a context using `Y.bind()`.</dd>
+
+  <dt>headers</dt>
+    <dd>Object map of transaction headers to send to the server. The
+    object keys are the header names and the values are the header
+    values.</dd>
+
+  <dt>timeout</dt>
+    <dd>Millisecond threshold for the transaction before being
+    automatically aborted.</dd>
+
+  <dt>arguments</dt>
+    <dd>User-defined data passed to all registered event handlers.
+    This value is available as the second argument in the "start" and
+    "end" event handlers. It is the third argument in the "complete",
+    "success", and "failure" event handlers. <strong>Be sure to quote
+    this property name in the transaction configuration as
+    "arguments" is a reserved word in JavaScript</strong> (e.g.
+    `Y.io({ ..., "arguments": stuff })`).</dd>
+</dl>
+
+@method io
+@static
+@param {String} url qualified path to transaction resource.
+@param {Object} config configuration object for the transaction.
+@return {Object}
+@for YUI
+**/
+Y.io = function(url, config) {
+    // Calling IO through the static interface will use and reuse
+    // an instance of IO.
+    var transaction = Y.io._map['io:0'] || new IO();
+    return transaction.send.apply(transaction, [url, config]);
+};
+
+/**
+Method for setting and deleting IO HTTP headers to be sent with every
+request.
+
+Hosted as a property on the `io` function (e.g. `Y.io.header`).
+
+@method header
+@param {String} name HTTP header
+@param {String} value HTTP header value
+@static
+**/
+Y.io.header = function(name, value) {
+    // Calling IO through the static interface will use and reuse
+    // an instance of IO.
+    var transaction = Y.io._map['io:0'] || new IO();
+    transaction.setHeader(name, value);
+};
+
+Y.IO = IO;
+// Map of all IO instances created.
+Y.io._map = {};
+var XHR = win && win.XMLHttpRequest,
+    XDR = win && win.XDomainRequest,
+    AX = win && win.ActiveXObject,
+
+    // Checks for the presence of the `withCredentials` in an XHR instance
+    // object, which will be present if the environment supports CORS.
+    SUPPORTS_CORS = XHR && 'withCredentials' in (new XMLHttpRequest());
+
+
+Y.mix(Y.IO, {
+    /**
+    * The ID of the default IO transport, defaults to `xhr`
+    * @property _default
+    * @type {String}
+    * @static
+    */
+    _default: 'xhr',
+    /**
+    *
+    * @method defaultTransport
+    * @static
+    * @param {String} [id] The transport to set as the default, if empty a new transport is created.
+    * @return {Object} The transport object with a `send` method
+    */
+    defaultTransport: function(id) {
+        if (id) {
+            Y.IO._default = id;
+        } else {
+            var o = {
+                c: Y.IO.transports[Y.IO._default](),
+                notify: Y.IO._default === 'xhr' ? false : true
+            };
+            return o;
+        }
+    },
+    /**
+    * An object hash of custom transports available to IO
+    * @property transports
+    * @type {Object}
+    * @static
+    */
+    transports: {
+        xhr: function () {
+            return XHR ? new XMLHttpRequest() :
+                AX ? new ActiveXObject('Microsoft.XMLHTTP') : null;
+        },
+        xdr: function () {
+            return XDR ? new XDomainRequest() : null;
+        },
+        iframe: function () { return {}; },
+        flash: null,
+        nodejs: null
+    },
+    /**
+    * Create a custom transport of type and return it's object
+    * @method customTransport
+    * @param {String} id The id of the transport to create.
+    * @static
+    */
+    customTransport: function(id) {
+        var o = { c: Y.IO.transports[id]() };
+
+        o[(id === 'xdr' || id === 'flash') ? 'xdr' : 'notify'] = true;
+        return o;
+    }
+});
+
+Y.mix(Y.IO.prototype, {
+    /**
+    * Fired from the notify method of the transport which in turn fires
+    * the event on the IO object.
+    * @method notify
+    * @param {String} event The name of the event
+    * @param {Object} transaction The transaction object
+    * @param {Object} config The configuration object for this transaction
+    */
+    notify: function(event, transaction, config) {
+        var io = this;
+
+        switch (event) {
+            case 'timeout':
+            case 'abort':
+            case 'transport error':
+                transaction.c = { status: 0, statusText: event };
+                event = 'failure';
+            default:
+                io[event].apply(io, [transaction, config]);
+        }
+    }
+});
+
+
+
+
+}, '3.10.3', {"requires": ["event-custom-base", "querystring-stringify-simple"]});