/trunk/include/yui/connection/connection.js - WB 2.11.0 - Tracking

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       /*
       Copyright (c) 2009, Yahoo! Inc. All rights reserved.
       Code licensed under the BSD License:
       http://developer.yahoo.net/yui/license.txt
       version: 2.8.0r4
       */
       /**
        * The Connection Manager provides a simplified interface to the XMLHttpRequest
        * object.  It handles cross-browser instantiantion of XMLHttpRequest, negotiates the
        * interactive states and server response, returning the results to a pre-defined
        * callback you create.
+       *
        * @namespace YAHOO.util
        * @module connection
        * @requires yahoo
        * @requires event
        */
       /**
        * The Connection Manager singleton provides methods for creating and managing
        * asynchronous transactions.
+       *
        * @class Connect
        */
       YAHOO.util.Connect =
+      {
         /**
         * @description Array of MSFT ActiveX ids for XMLHttpRequest.
         * @property _msxml_progid
         * @private
         * @static
         * @type array
          */
           _msxml_progid:[
               'Microsoft.XMLHTTP',
               'MSXML2.XMLHTTP.3.0',
               'MSXML2.XMLHTTP'
               ],
         /**
         * @description Object literal of HTTP header(s)
         * @property _http_header
         * @private
         * @static
         * @type object
          */
           _http_headers:{},
         /**
         * @description Determines if HTTP headers are set.
         * @property _has_http_headers
         * @private
         * @static
         * @type boolean
          */
           _has_http_headers:false,
        /**
        * @description Determines if a default header of
         * Content-Type of 'application/x-www-form-urlencoded'
         * will be added to any client HTTP headers sent for POST
         * transactions.
        * @property _use_default_post_header
        * @private
        * @static
        * @type boolean
         */
           _use_default_post_header:true,
        /**
        * @description The default header used for POST transactions.
        * @property _default_post_header
        * @private
        * @static
        * @type boolean
         */
           _default_post_header:'application/x-www-form-urlencoded; charset=UTF-8',
        /**
        * @description The default header used for transactions involving the
         * use of HTML forms.
        * @property _default_form_header
        * @private
        * @static
        * @type boolean
         */
           _default_form_header:'application/x-www-form-urlencoded',
        /**
        * @description Determines if a default header of
         * 'X-Requested-With: XMLHttpRequest'
         * will be added to each transaction.
        * @property _use_default_xhr_header
        * @private
        * @static
        * @type boolean
         */
           _use_default_xhr_header:true,
        /**
        * @description The default header value for the label
         * "X-Requested-With".  This is sent with each
         * transaction, by default, to identify the
         * request as being made by YUI Connection Manager.
        * @property _default_xhr_header
        * @private
        * @static
        * @type boolean
         */
           _default_xhr_header:'XMLHttpRequest',
        /**
        * @description Determines if custom, default headers
         * are set for each transaction.
        * @property _has_default_header
        * @private
        * @static
        * @type boolean
         */
           _has_default_headers:true,
        /**
        * @description Determines if custom, default headers
         * are set for each transaction.
        * @property _has_default_header
        * @private
        * @static
        * @type boolean
         */
           _default_headers:{},
        /**
        * @description Collection of polling references to the polling mechanism in handleReadyState.
        * @property _poll
        * @private
        * @static
        * @type object
         */
           _poll:{},
        /**
        * @description Queue of timeout values for each transaction callback with a defined timeout value.
        * @property _timeOut
        * @private
        * @static
        * @type object
         */
           _timeOut:{},
         /**
         * @description The polling frequency, in milliseconds, for HandleReadyState.
          * when attempting to determine a transaction's XHR readyState.
          * The default is 50 milliseconds.
         * @property _polling_interval
         * @private
         * @static
         * @type int
          */
            _polling_interval:50,
         /**
         * @description A transaction counter that increments the transaction id for each transaction.
         * @property _transaction_id
         * @private
         * @static
         * @type int
          */
            _transaction_id:0,
         /**
         * @description Custom event that fires at the start of a transaction
         * @property startEvent
         * @private
         * @static
         * @type CustomEvent
          */
           startEvent: new YAHOO.util.CustomEvent('start'),
         /**
         * @description Custom event that fires when a transaction response has completed.
         * @property completeEvent
         * @private
         * @static
         * @type CustomEvent
          */
           completeEvent: new YAHOO.util.CustomEvent('complete'),
         /**
         * @description Custom event that fires when handleTransactionResponse() determines a
          * response in the HTTP 2xx range.
         * @property successEvent
         * @private
         * @static
         * @type CustomEvent
          */
           successEvent: new YAHOO.util.CustomEvent('success'),
         /**
         * @description Custom event that fires when handleTransactionResponse() determines a
          * response in the HTTP 4xx/5xx range.
         * @property failureEvent
         * @private
         * @static
         * @type CustomEvent
          */
           failureEvent: new YAHOO.util.CustomEvent('failure'),
         /**
         * @description Custom event that fires when a transaction is successfully aborted.
         * @property abortEvent
         * @private
         * @static
         * @type CustomEvent
          */
           abortEvent: new YAHOO.util.CustomEvent('abort'),
         /**
         * @description A reference table that maps callback custom events members to its specific
          * event name.
         * @property _customEvents
         * @private
         * @static
         * @type object
          */
           _customEvents:
+          {
               onStart:['startEvent', 'start'],
               onComplete:['completeEvent', 'complete'],
               onSuccess:['successEvent', 'success'],
               onFailure:['failureEvent', 'failure'],
               onUpload:['uploadEvent', 'upload'],
               onAbort:['abortEvent', 'abort']
           },
         /**
         * @description Member to add an ActiveX id to the existing xml_progid array.
          * In the event(unlikely) a new ActiveX id is introduced, it can be added
          * without internal code modifications.
         * @method setProgId
         * @public
         * @static
         * @param {string} id The ActiveX id to be added to initialize the XHR object.
         * @return void
          */
           setProgId:function(id)
+          {
               this._msxml_progid.unshift(id);
           },
         /**
         * @description Member to override the default POST header.
         * @method setDefaultPostHeader
         * @public
         * @static
         * @param {boolean} b Set and use default header - true or false .
         * @return void
          */
           setDefaultPostHeader:function(b)
+          {
               if(typeof b == 'string'){
                   this._default_post_header = b;
+              }
               else if(typeof b == 'boolean'){
                   this._use_default_post_header = b;
+              }
           },
         /**
         * @description Member to override the default transaction header..
         * @method setDefaultXhrHeader
         * @public
         * @static
         * @param {boolean} b Set and use default header - true or false .
         * @return void
          */
           setDefaultXhrHeader:function(b)
+          {
               if(typeof b == 'string'){
                   this._default_xhr_header = b;
+              }
               else{
                   this._use_default_xhr_header = b;
+              }
           },
         /**
         * @description Member to modify the default polling interval.
         * @method setPollingInterval
         * @public
         * @static
         * @param {int} i The polling interval in milliseconds.
         * @return void
          */
           setPollingInterval:function(i)
+          {
               if(typeof i == 'number' && isFinite(i)){
                   this._polling_interval = i;
+              }
           },
         /**
         * @description Instantiates a XMLHttpRequest object and returns an object with two properties:
          * the XMLHttpRequest instance and the transaction id.
         * @method createXhrObject
         * @private
         * @static
         * @param {int} transactionId Property containing the transaction id for this transaction.
         * @return object
          */
           createXhrObject:function(transactionId)
+          {
               var obj,http,i;
               try
+              {
                   // Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
                   http = new XMLHttpRequest();
                   //  Object literal with http and tId properties
                   obj = { conn:http, tId:transactionId, xhr: true };
+              }
               catch(e)
+              {
                   for(i=0; i<this._msxml_progid.length; ++i){
                       try
+                      {
                           // Instantiates XMLHttpRequest for IE and assign to http
                           http = new ActiveXObject(this._msxml_progid[i]);
                           //  Object literal with conn and tId properties
                           obj = { conn:http, tId:transactionId, xhr: true };
                           break;
+                      }
                       catch(e1){}
+                  }
+              }
               finally
+              {
                   return obj;
+              }
           },
         /**
         * @description This method is called by asyncRequest to create a
          * valid connection object for the transaction.  It also passes a
          * transaction id and increments the transaction id counter.
         * @method getConnectionObject
         * @private
         * @static
         * @return {object}
          */
           getConnectionObject:function(t)
+          {
               var o, tId = this._transaction_id;
               try
+              {
                   if(!t){
                       o = this.createXhrObject(tId);
+                  }
                   else{
                       o = {tId:tId};
                       if(t==='xdr'){
                           o.conn = this._transport;
                           o.xdr = true;
+                      }
                       else if(t==='upload'){
                           o.upload = true;
+                      }
+                  }
                   if(o){
                       this._transaction_id++;
+                  }
+              }
               catch(e){}
               return o;
           },
         /**
         * @description Method for initiating an asynchronous request via the XHR object.
         * @method asyncRequest
         * @public
         * @static
         * @param {string} method HTTP transaction method
         * @param {string} uri Fully qualified path of resource
         * @param {callback} callback User-defined callback function or object
         * @param {string} postData POST body
         * @return {object} Returns the connection object
          */
           asyncRequest:function(method, uri, callback, postData)
+          {
               var o,t,args = (callback && callback.argument)?callback.argument:null;
               if(this._isFileUpload){
                   t = 'upload';
+              }
               else if(callback.xdr){
                   t = 'xdr';
+              }
               o = this.getConnectionObject(t);
               if(!o){
                   return null;
+              }
               else{
                   // Intialize any transaction-specific custom events, if provided.
                   if(callback && callback.customevents){
                       this.initCustomEvents(o, callback);
+                  }
                   if(this._isFormSubmit){
                       if(this._isFileUpload){
                           this.uploadFile(o, callback, uri, postData);
                           return o;
+                      }
                       // If the specified HTTP method is GET, setForm() will return an
                       // encoded string that is concatenated to the uri to
                       // create a querystring.
                       if(method.toUpperCase() == 'GET'){
                           if(this._sFormData.length !== 0){
                               // If the URI already contains a querystring, append an ampersand
                               // and then concatenate _sFormData to the URI.
                               uri += ((uri.indexOf('?') == -1)?'?':'&') + this._sFormData;
+                          }
+                      }
                       else if(method.toUpperCase() == 'POST'){
                           // If POST data exist in addition to the HTML form data,
                           // it will be concatenated to the form data.
                           postData = postData?this._sFormData + "&" + postData:this._sFormData;
+                      }
+                  }
                   if(method.toUpperCase() == 'GET' && (callback && callback.cache === false)){
                       // If callback.cache is defined and set to false, a
                       // timestamp value will be added to the querystring.
                       uri += ((uri.indexOf('?') == -1)?'?':'&') + "rnd=" + new Date().valueOf().toString();
+                  }
                   // Each transaction will automatically include a custom header of
                   // "X-Requested-With: XMLHttpRequest" to identify the request as
                   // having originated from Connection Manager.
                   if(this._use_default_xhr_header){
                       if(!this._default_headers['X-Requested-With']){
                           this.initHeader('X-Requested-With', this._default_xhr_header, true);
+                      }
+                  }
                   //If the transaction method is POST and the POST header value is set to true
                   //or a custom value, initalize the Content-Type header to this value.
                   if((method.toUpperCase() === 'POST' && this._use_default_post_header) && this._isFormSubmit === false){
                       this.initHeader('Content-Type', this._default_post_header);
+                  }
                   if(o.xdr){
                       this.xdr(o, method, uri, callback, postData);
                       return o;
+                  }
                   o.conn.open(method, uri, true);
                   //Initialize all default and custom HTTP headers,
                   if(this._has_default_headers || this._has_http_headers){
                       this.setHeader(o);
+                  }
                   this.handleReadyState(o, callback);
                   o.conn.send(postData || '');
                   // Reset the HTML form data and state properties as
                   // soon as the data are submitted.
                   if(this._isFormSubmit === true){
                       this.resetFormState();
+                  }
                   // Fire global custom event -- startEvent
                   this.startEvent.fire(o, args);
                   if(o.startEvent){
                       // Fire transaction custom event -- startEvent
                       o.startEvent.fire(o, args);
+                  }
                   return o;
+              }
           },
         /**
         * @description This method creates and subscribes custom events,
          * specific to each transaction
         * @method initCustomEvents
         * @private
         * @static
         * @param {object} o The connection object
         * @param {callback} callback The user-defined callback object
         * @return {void}
          */
           initCustomEvents:function(o, callback)
+          {
               var prop;
               // Enumerate through callback.customevents members and bind/subscribe
               // events that match in the _customEvents table.
               for(prop in callback.customevents){
                   if(this._customEvents[prop][0]){
                       // Create the custom event
                       o[this._customEvents[prop][0]] = new YAHOO.util.CustomEvent(this._customEvents[prop][1], (callback.scope)?callback.scope:null);
                       // Subscribe the custom event
                       o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
+                  }
+              }
           },
         /**
         * @description This method serves as a timer that polls the XHR object's readyState
          * property during a transaction, instead of binding a callback to the
          * onreadystatechange event.  Upon readyState 4, handleTransactionResponse
          * will process the response, and the timer will be cleared.
         * @method handleReadyState
         * @private
         * @static
         * @param {object} o The connection object
         * @param {callback} callback The user-defined callback object
         * @return {void}
          */
           handleReadyState:function(o, callback)
+          {
               var oConn = this,
                   args = (callback && callback.argument)?callback.argument:null;
               if(callback && callback.timeout){
                   this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
+              }
               this._poll[o.tId] = window.setInterval(
                   function(){
                       if(o.conn && o.conn.readyState === 4){
                           // Clear the polling interval for the transaction
                           // and remove the reference from _poll.
                           window.clearInterval(oConn._poll[o.tId]);
                           delete oConn._poll[o.tId];
                           if(callback && callback.timeout){
                               window.clearTimeout(oConn._timeOut[o.tId]);
                               delete oConn._timeOut[o.tId];
+                          }
                           // Fire global custom event -- completeEvent
                           oConn.completeEvent.fire(o, args);
                           if(o.completeEvent){
                               // Fire transaction custom event -- completeEvent
                               o.completeEvent.fire(o, args);
+                          }
                           oConn.handleTransactionResponse(o, callback);
+                      }
+                  }
               ,this._polling_interval);
           },
         /**
         * @description This method attempts to interpret the server response and
          * determine whether the transaction was successful, or if an error or
          * exception was encountered.
         * @method handleTransactionResponse
         * @private
         * @static
         * @param {object} o The connection object
         * @param {object} callback The user-defined callback object
         * @param {boolean} isAbort Determines if the transaction was terminated via abort().
         * @return {void}
          */
           handleTransactionResponse:function(o, callback, isAbort)
+          {
               var httpStatus, responseObject,
                   args = (callback && callback.argument)?callback.argument:null,
                   xdrS = (o.r && o.r.statusText === 'xdr:success')?true:false,
                   xdrF = (o.r && o.r.statusText === 'xdr:failure')?true:false,
                   xdrA = isAbort;
               try
+              {
                   if((o.conn.status !== undefined && o.conn.status !== 0) || xdrS){
                       // XDR requests will not have HTTP status defined. The
                       // statusText property will define the response status
                       // set by the Flash transport.
                       httpStatus = o.conn.status;
+                  }
                   else if(xdrF && !xdrA){
                       // Set XDR transaction failure to a status of 0, which
                       // resolves as an HTTP failure, instead of an exception.
                       httpStatus = 0;
+                  }
                   else{
                       httpStatus = 13030;
+                  }
+              }
               catch(e){
                    // 13030 is a custom code to indicate the condition -- in Mozilla/FF --
                    // when the XHR object's status and statusText properties are
                    // unavailable, and a query attempt throws an exception.
                   httpStatus = 13030;
+              }
               if((httpStatus >= 200 && httpStatus < 300) || httpStatus === 1223 || xdrS){
                   responseObject = o.xdr ? o.r : this.createResponseObject(o, args);
                   if(callback && callback.success){
                       if(!callback.scope){
                           callback.success(responseObject);
+                      }
                       else{
                           // If a scope property is defined, the callback will be fired from
                           // the context of the object.
                           callback.success.apply(callback.scope, [responseObject]);
+                      }
+                  }
                   // Fire global custom event -- successEvent
                   this.successEvent.fire(responseObject);
                   if(o.successEvent){
                       // Fire transaction custom event -- successEvent
                       o.successEvent.fire(responseObject);
+                  }
+              }
               else{
                   switch(httpStatus){
                       // The following cases are wininet.dll error codes that may be encountered.
                       case 12002: // Server timeout
                       case 12029: // 12029 to 12031 correspond to dropped connections.
                       case 12030:
                       case 12031:
                       case 12152: // Connection closed by server.
                       case 13030: // See above comments for variable status.
                           // XDR transactions will not resolve to this case, since the
                           // response object is already built in the xdr response.
                           responseObject = this.createExceptionObject(o.tId, args, (isAbort?isAbort:false));
                           if(callback && callback.failure){
                               if(!callback.scope){
                                   callback.failure(responseObject);
+                              }
                               else{
                                   callback.failure.apply(callback.scope, [responseObject]);
+                              }
+                          }
                           break;
                       default:
                           responseObject = (o.xdr) ? o.response : this.createResponseObject(o, args);
                           if(callback && callback.failure){
                               if(!callback.scope){
                                   callback.failure(responseObject);
+                              }
                               else{
                                   callback.failure.apply(callback.scope, [responseObject]);
+                              }
+                          }
+                  }
                   // Fire global custom event -- failureEvent
                   this.failureEvent.fire(responseObject);
                   if(o.failureEvent){
                       // Fire transaction custom event -- failureEvent
                       o.failureEvent.fire(responseObject);
+                  }
+              }
               this.releaseObject(o);
               responseObject = null;
           },
         /**
         * @description This method evaluates the server response, creates and returns the results via
          * its properties.  Success and failure cases will differ in the response
          * object's property values.
         * @method createResponseObject
         * @private
         * @static
         * @param {object} o The connection object
         * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
         * @return {object}
          */
           createResponseObject:function(o, callbackArg)
+          {
               var obj = {}, headerObj = {},
                   i, headerStr, header, delimitPos;
               try
+              {
                   headerStr = o.conn.getAllResponseHeaders();
                   header = headerStr.split('\n');
                   for(i=0; i<header.length; i++){
                       delimitPos = header[i].indexOf(':');
                       if(delimitPos != -1){
                           headerObj[header[i].substring(0,delimitPos)] = YAHOO.lang.trim(header[i].substring(delimitPos+2));
+                      }
+                  }
+              }
               catch(e){}
               obj.tId = o.tId;
               // Normalize IE's response to HTTP 204 when Win error 1223.
               obj.status = (o.conn.status == 1223)?204:o.conn.status;
               // Normalize IE's statusText to "No Content" instead of "Unknown".
               obj.statusText = (o.conn.status == 1223)?"No Content":o.conn.statusText;
               obj.getResponseHeader = headerObj;
               obj.getAllResponseHeaders = headerStr;
               obj.responseText = o.conn.responseText;
               obj.responseXML = o.conn.responseXML;
               if(callbackArg){
                   obj.argument = callbackArg;
+              }
               return obj;
           },
         /**
         * @description If a transaction cannot be completed due to dropped or closed connections,
          * there may be not be enough information to build a full response object.
          * The failure callback will be fired and this specific condition can be identified
          * by a status property value of 0.
+         *
          * If an abort was successful, the status property will report a value of -1.
+         *
         * @method createExceptionObject
         * @private
         * @static
         * @param {int} tId The Transaction Id
         * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
         * @param {boolean} isAbort Determines if the exception case is caused by a transaction abort
         * @return {object}
          */
           createExceptionObject:function(tId, callbackArg, isAbort)
+          {
               var COMM_CODE = 0,
                   COMM_ERROR = 'communication failure',
                   ABORT_CODE = -1,
                   ABORT_ERROR = 'transaction aborted',
                   obj = {};
               obj.tId = tId;
               if(isAbort){
                   obj.status = ABORT_CODE;
                   obj.statusText = ABORT_ERROR;
+              }
               else{
                   obj.status = COMM_CODE;
                   obj.statusText = COMM_ERROR;
+              }
               if(callbackArg){
                   obj.argument = callbackArg;
+              }
               return obj;
           },
         /**
         * @description Method that initializes the custom HTTP headers for the each transaction.
         * @method initHeader
         * @public
         * @static
         * @param {string} label The HTTP header label
         * @param {string} value The HTTP header value
         * @param {string} isDefault Determines if the specific header is a default header
          * automatically sent with each transaction.
         * @return {void}
          */
           initHeader:function(label, value, isDefault)
+          {
               var headerObj = (isDefault)?this._default_headers:this._http_headers;
               headerObj[label] = value;
               if(isDefault){
                   this._has_default_headers = true;
+              }
               else{
                   this._has_http_headers = true;
+              }
           },
         /**
         * @description Accessor that sets the HTTP headers for each transaction.
         * @method setHeader
         * @private
         * @static
         * @param {object} o The connection object for the transaction.
         * @return {void}
          */
           setHeader:function(o)
+          {
               var prop;
               if(this._has_default_headers){
                   for(prop in this._default_headers){
                       if(YAHOO.lang.hasOwnProperty(this._default_headers, prop)){
                           o.conn.setRequestHeader(prop, this._default_headers[prop]);
+                      }
+                  }
+              }
               if(this._has_http_headers){
                   for(prop in this._http_headers){
                       if(YAHOO.lang.hasOwnProperty(this._http_headers, prop)){
                           o.conn.setRequestHeader(prop, this._http_headers[prop]);
+                      }
+                  }
                   this._http_headers = {};
                   this._has_http_headers = false;
+              }
           },
         /**
         * @description Resets the default HTTP headers object
         * @method resetDefaultHeaders
         * @public
         * @static
         * @return {void}
          */
           resetDefaultHeaders:function(){
               this._default_headers = {};
               this._has_default_headers = false;
           },
         /**
         * @description Method to terminate a transaction, if it has not reached readyState 4.
         * @method abort
         * @public
         * @static
         * @param {object} o The connection object returned by asyncRequest.
         * @param {object} callback  User-defined callback object.
         * @param {string} isTimeout boolean to indicate if abort resulted from a callback timeout.
         * @return {boolean}
          */
           abort:function(o, callback, isTimeout)
+          {
               var abortStatus,
                   args = (callback && callback.argument)?callback.argument:null;
                   o = o || {};
               if(o.conn){
                   if(o.xhr){
                       if(this.isCallInProgress(o)){
                           // Issue abort request
                           o.conn.abort();
                           window.clearInterval(this._poll[o.tId]);
                           delete this._poll[o.tId];
                           if(isTimeout){
                               window.clearTimeout(this._timeOut[o.tId]);
                               delete this._timeOut[o.tId];
+                          }
                           abortStatus = true;
+                      }
+                  }
                   else if(o.xdr){
                       o.conn.abort(o.tId);
                       abortStatus = true;
+                  }
+              }
               else if(o.upload){
                   var frameId = 'yuiIO' + o.tId;
                   var io = document.getElementById(frameId);
                   if(io){
                       // Remove all listeners on the iframe prior to
                       // its destruction.
                       YAHOO.util.Event.removeListener(io, "load");
                       // Destroy the iframe facilitating the transaction.
                       document.body.removeChild(io);
                       if(isTimeout){
                           window.clearTimeout(this._timeOut[o.tId]);
                           delete this._timeOut[o.tId];
+                      }
                       abortStatus = true;
+                  }
+              }
               else{
                   abortStatus = false;
+              }
               if(abortStatus === true){
                   // Fire global custom event -- abortEvent
                   this.abortEvent.fire(o, args);
                   if(o.abortEvent){
                       // Fire transaction custom event -- abortEvent
                       o.abortEvent.fire(o, args);
+                  }
                   this.handleTransactionResponse(o, callback, true);
+              }
               return abortStatus;
           },
         /**
         * @description Determines if the transaction is still being processed.
         * @method isCallInProgress
         * @public
         * @static
         * @param {object} o The connection object returned by asyncRequest
         * @return {boolean}
          */
           isCallInProgress:function(o)
+          {
               o = o || {};
               // if the XHR object assigned to the transaction has not been dereferenced,
               // then check its readyState status.  Otherwise, return false.
               if(o.xhr && o.conn){
                   return o.conn.readyState !== 4 && o.conn.readyState !== 0;
+              }
               else if(o.xdr && o.conn){
                   return o.conn.isCallInProgress(o.tId);
+              }
               else if(o.upload === true){
                   return document.getElementById('yuiIO' + o.tId)?true:false;
+              }
               else{
                   return false;
+              }
           },
         /**
         * @description Dereference the XHR instance and the connection object after the transaction is completed.
         * @method releaseObject
         * @private
         * @static
         * @param {object} o The connection object
         * @return {void}
          */
           releaseObject:function(o)
+          {
               if(o && o.conn){
                   //dereference the XHR instance.
                   o.conn = null;
                   //dereference the connection object.
                   o = null;
+              }
+          }
       };
       /**
        * @for Connect
         */
       (function() {
           var YCM = YAHOO.util.Connect, _fn = {};
          /**
          * @description This method creates and instantiates the Flash transport.
          * @method _swf
          * @private
          * @static
          * @param {string} URI to connection.swf.
          * @return {void}
           */
           function _swf(uri) {
               var o = '<object id="YUIConnectionSwf" type="application/x-shockwave-flash" data="' +
                       uri + '" width="0" height="0">' +
                        '<param name="movie" value="' + uri + '">' +
                       '<param name="allowScriptAccess" value="always">' +
                       '</object>',
                   c = document.createElement('div');
               document.body.appendChild(c);
               c.innerHTML = o;
+          }
          /**
          * @description This method calls the public method on the
           * Flash transport to start the XDR transaction.  It is analogous
           * to Connection Manager's asyncRequest method.
          * @method xdr
          * @private
          * @static
          * @param {object} The transaction object.
          * @param {string} HTTP request method.
          * @param {string} URI for the transaction.
          * @param {object} The transaction's callback object.
          * @param {object} The JSON object used as HTTP POST data.
          * @return {void}
           */
           function _xdr(o, m, u, c, d) {
               _fn[parseInt(o.tId)] = { 'o':o, 'c':c };
               if (d) {
                   c.method = m;
                   c.data = d;
+              }
               o.conn.send(u, c, o.tId);
+          }
          /**
          * @description This method instantiates the Flash transport and
           * establishes a static reference to it, used for all XDR requests.
          * @method transport
          * @public
          * @static
          * @param {string} URI to connection.swf.
          * @return {void}
           */
           function _init(uri) {
               _swf(uri);
               YCM._transport = document.getElementById('YUIConnectionSwf');
+          }
           function _xdrReady() {
               YCM.xdrReadyEvent.fire();
+          }
          /**
          * @description This method fires the global and transaction start
           * events.
          * @method _xdrStart
          * @private
          * @static
          * @param {object} The transaction object.
          * @param {string} The transaction's callback object.
          * @return {void}
           */
           function _xdrStart(o, cb) {
               if (o) {
                   // Fire global custom event -- startEvent
                   YCM.startEvent.fire(o, cb.argument);
                   if(o.startEvent){
                       // Fire transaction custom event -- startEvent
                       o.startEvent.fire(o, cb.argument);
+                  }
+              }
+          }
          /**
          * @description This method is the initial response handler
           * for XDR transactions.  The Flash transport calls this
           * function and sends the response payload.
          * @method handleXdrResponse
          * @private
          * @static
          * @param {object} The response object sent from the Flash transport.
          * @return {void}
           */
           function _handleXdrResponse(r) {
               var o = _fn[r.tId].o,
                   cb = _fn[r.tId].c;
               if (r.statusText === 'xdr:start') {
                   _xdrStart(o, cb);
                   return;
+              }
               r.responseText = decodeURI(r.responseText);
               o.r = r;
               if (cb.argument) {
                   o.r.argument = cb.argument;
+              }
               this.handleTransactionResponse(o, cb, r.statusText === 'xdr:abort' ? true : false);
               delete _fn[r.tId];
+          }
           // Bind the functions to Connection Manager as static fields.
           YCM.xdr = _xdr;
           YCM.swf = _swf;
           YCM.transport = _init;
           YCM.xdrReadyEvent = new YAHOO.util.CustomEvent('xdrReady');
           YCM.xdrReady = _xdrReady;
           YCM.handleXdrResponse = _handleXdrResponse;
       })();
       /**
        * @for Connect
         */
       (function(){
           var YCM = YAHOO.util.Connect,
               YE = YAHOO.util.Event;
          /**
           * @description Property modified by setForm() to determine if the data
           * should be submitted as an HTML form.
           * @property _isFormSubmit
           * @private
           * @static
           * @type boolean
           */
           YCM._isFormSubmit = false;
          /**
           * @description Property modified by setForm() to determine if a file(s)
           * upload is expected.
           * @property _isFileUpload
           * @private
           * @static
           * @type boolean
           */
           YCM._isFileUpload = false;
          /**
           * @description Property modified by setForm() to set a reference to the HTML
           * form node if the desired action is file upload.
           * @property _formNode
           * @private
           * @static
           * @type object
           */
           YCM._formNode = null;
          /**
           * @description Property modified by setForm() to set the HTML form data
           * for each transaction.
           * @property _sFormData
           * @private
           * @static
           * @type string
           */
           YCM._sFormData = null;
          /**
           * @description Tracks the name-value pair of the "clicked" submit button if multiple submit
           * buttons are present in an HTML form; and, if YAHOO.util.Event is available.
           * @property _submitElementValue
           * @private
           * @static
           * @type string
           */
           YCM._submitElementValue = null;
          /**
          * @description Custom event that fires when handleTransactionResponse() determines a
           * response in the HTTP 4xx/5xx range.
          * @property failureEvent
          * @private
          * @static
          * @type CustomEvent
           */
           YCM.uploadEvent = new YAHOO.util.CustomEvent('upload'),
          /**
           * @description Determines whether YAHOO.util.Event is available and returns true or false.
           * If true, an event listener is bound at the document level to trap click events that
           * resolve to a target type of "Submit".  This listener will enable setForm() to determine
           * the clicked "Submit" value in a multi-Submit button, HTML form.
           * @property _hasSubmitListener
           * @private
           * @static
           */
           YCM._hasSubmitListener = function() {
               if(YE){
                   YE.addListener(
                       document,
                       'click',
                       function(e){
                           var obj = YE.getTarget(e),
                               name = obj.nodeName.toLowerCase();
                           if((name === 'input' || name === 'button') && (obj.type && obj.type.toLowerCase() == 'submit')){
                               YCM._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
+                          }
                       });
                   return true;
+              }
               return false;
           }();
         /**
         * @description This method assembles the form label and value pairs and
          * constructs an encoded string.
          * asyncRequest() will automatically initialize the transaction with a
          * a HTTP header Content-Type of application/x-www-form-urlencoded.
         * @method setForm
         * @public
         * @static
         * @param {string || object} form id or name attribute, or form object.
         * @param {boolean} optional enable file upload.
         * @param {boolean} optional enable file upload over SSL in IE only.
         * @return {string} string of the HTML form field name and value pairs..
          */
           function _setForm(formId, isUpload, secureUri)
+          {
               var oForm, oElement, oName, oValue, oDisabled,
                   hasSubmit = false,
                   data = [], item = 0,
                   i,len,j,jlen,opt;
               this.resetFormState();
               if(typeof formId == 'string'){
                   // Determine if the argument is a form id or a form name.
                   // Note form name usage is deprecated by supported
                   // here for legacy reasons.
                   oForm = (document.getElementById(formId) || document.forms[formId]);
+              }
               else if(typeof formId == 'object'){
                   // Treat argument as an HTML form object.
                   oForm = formId;
+              }
               else{
                   return;
+              }
               // If the isUpload argument is true, setForm will call createFrame to initialize
               // an iframe as the form target.
               //
               // The argument secureURI is also required by IE in SSL environments
               // where the secureURI string is a fully qualified HTTP path, used to set the source
               // of the iframe, to a stub resource in the same domain.
               if(isUpload){
                   // Create iframe in preparation for file upload.
                   this.createFrame(secureUri?secureUri:null);
                   // Set form reference and file upload properties to true.
                   this._isFormSubmit = true;
                   this._isFileUpload = true;
                   this._formNode = oForm;
                   return;
+              }
               // Iterate over the form elements collection to construct the
               // label-value pairs.
               for (i=0,len=oForm.elements.length; i<len; ++i){
                   oElement  = oForm.elements[i];
                   oDisabled = oElement.disabled;
                   oName     = oElement.name;
                   // Do not submit fields that are disabled or
                   // do not have a name attribute value.
                   if(!oDisabled && oName)
+                  {
                       oName  = encodeURIComponent(oName)+'=';
                       oValue = encodeURIComponent(oElement.value);
                       switch(oElement.type)
+                      {
                           // Safari, Opera, FF all default opt.value from .text if
                           // value attribute not specified in markup
                           case 'select-one':
                               if (oElement.selectedIndex > -1) {
                                   opt = oElement.options[oElement.selectedIndex];
                                   data[item++] = oName + encodeURIComponent(
                                       (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
+                              }
                               break;
                           case 'select-multiple':
                               if (oElement.selectedIndex > -1) {
                                   for(j=oElement.selectedIndex, jlen=oElement.options.length; j<jlen; ++j){
                                       opt = oElement.options[j];
                                       if (opt.selected) {
                                           data[item++] = oName + encodeURIComponent(
                                               (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
+                                      }
+                                  }
+                              }
                               break;
                           case 'radio':
                           case 'checkbox':
                               if(oElement.checked){
                                   data[item++] = oName + oValue;
+                              }
                               break;
                           case 'file':
                               // stub case as XMLHttpRequest will only send the file path as a string.
                           case undefined:
                               // stub case for fieldset element which returns undefined.
                           case 'reset':
                               // stub case for input type reset button.
                           case 'button':
                               // stub case for input type button elements.
                               break;
                           case 'submit':
                               if(hasSubmit === false){
                                   if(this._hasSubmitListener && this._submitElementValue){
                                       data[item++] = this._submitElementValue;
+                                  }
                                   hasSubmit = true;
+                              }
                               break;
                           default:
                               data[item++] = oName + oValue;
+                      }
+                  }
+              }
               this._isFormSubmit = true;
               this._sFormData = data.join('&');
               this.initHeader('Content-Type', this._default_form_header);
               return this._sFormData;
+          }
          /**
          * @description Resets HTML form properties when an HTML form or HTML form
           * with file upload transaction is sent.
          * @method resetFormState
          * @private
          * @static
          * @return {void}
           */
           function _resetFormState(){
               this._isFormSubmit = false;
               this._isFileUpload = false;
               this._formNode = null;
               this._sFormData = "";
+          }
          /**
          * @description Creates an iframe to be used for form file uploads.  It is remove from the
           * document upon completion of the upload transaction.
          * @method createFrame
          * @private
          * @static
          * @param {string} optional qualified path of iframe resource for SSL in IE.
          * @return {void}
           */
           function _createFrame(secureUri){
               // IE does not allow the setting of id and name attributes as object
               // properties via createElement().  A different iframe creation
               // pattern is required for IE.
               var frameId = 'yuiIO' + this._transaction_id,
                   io;
               if(YAHOO.env.ua.ie){
                   io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
                   // IE will throw a security exception in an SSL environment if the
                   // iframe source is undefined.
                   if(typeof secureUri == 'boolean'){
                       io.src = 'javascript:false';
+                  }
+              }
               else{
                   io = document.createElement('iframe');
                   io.id = frameId;
                   io.name = frameId;
+              }
               io.style.position = 'absolute';
               io.style.top = '-1000px';
               io.style.left = '-1000px';
               document.body.appendChild(io);
+          }
          /**
          * @description Parses the POST data and creates hidden form elements
           * for each key-value, and appends them to the HTML form object.
          * @method appendPostData
          * @private
          * @static
          * @param {string} postData The HTTP POST data
          * @return {array} formElements Collection of hidden fields.
           */
           function _appendPostData(postData){
               var formElements = [],
                   postMessage = postData.split('&'),
                   i, delimitPos;
               for(i=0; i < postMessage.length; i++){
                   delimitPos = postMessage[i].indexOf('=');
                   if(delimitPos != -1){
                       formElements[i] = document.createElement('input');
                       formElements[i].type = 'hidden';
                       formElements[i].name = decodeURIComponent(postMessage[i].substring(0,delimitPos));
                       formElements[i].value = decodeURIComponent(postMessage[i].substring(delimitPos+1));
                       this._formNode.appendChild(formElements[i]);
+                  }
+              }
               return formElements;
+          }
          /**
          * @description Uploads HTML form, inclusive of files/attachments, using the
           * iframe created in createFrame to facilitate the transaction.
          * @method uploadFile
          * @private
          * @static
          * @param {int} id The transaction id.
          * @param {object} callback User-defined callback object.
          * @param {string} uri Fully qualified path of resource.
          * @param {string} postData POST data to be submitted in addition to HTML form.
          * @return {void}
           */
           function _uploadFile(o, callback, uri, postData){
               // Each iframe has an id prefix of "yuiIO" followed
               // by the unique transaction id.
               var frameId = 'yuiIO' + o.tId,
                   uploadEncoding = 'multipart/form-data',
                   io = document.getElementById(frameId),
                   ie8 = (document.documentMode && document.documentMode === 8) ? true : false,
                   oConn = this,
                   args = (callback && callback.argument)?callback.argument:null,
                   oElements,i,prop,obj, rawFormAttributes, uploadCallback;
               // Track original HTML form attribute values.
               rawFormAttributes = {
                   action:this._formNode.getAttribute('action'),
                   method:this._formNode.getAttribute('method'),
                   target:this._formNode.getAttribute('target')
               };
               // Initialize the HTML form properties in case they are
               // not defined in the HTML form.
               this._formNode.setAttribute('action', uri);
               this._formNode.setAttribute('method', 'POST');
               this._formNode.setAttribute('target', frameId);
               if(YAHOO.env.ua.ie && !ie8){
                   // IE does not respect property enctype for HTML forms.
                   // Instead it uses the property - "encoding".
                   this._formNode.setAttribute('encoding', uploadEncoding);
+              }
               else{
                   this._formNode.setAttribute('enctype', uploadEncoding);
+              }
               if(postData){
                   oElements = this.appendPostData(postData);
+              }
               // Start file upload.
               this._formNode.submit();
               // Fire global custom event -- startEvent
               this.startEvent.fire(o, args);
               if(o.startEvent){
                   // Fire transaction custom event -- startEvent
                   o.startEvent.fire(o, args);
+              }
               // Start polling if a callback is present and the timeout
               // property has been defined.
               if(callback && callback.timeout){
                   this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
+              }
               // Remove HTML elements created by appendPostData
               if(oElements && oElements.length > 0){
                   for(i=0; i < oElements.length; i++){
                       this._formNode.removeChild(oElements[i]);
+                  }
+              }
               // Restore HTML form attributes to their original
               // values prior to file upload.
               for(prop in rawFormAttributes){
                   if(YAHOO.lang.hasOwnProperty(rawFormAttributes, prop)){
                       if(rawFormAttributes[prop]){
                           this._formNode.setAttribute(prop, rawFormAttributes[prop]);
+                      }
                       else{
                           this._formNode.removeAttribute(prop);
+                      }
+                  }
+              }
               // Reset HTML form state properties.
               this.resetFormState();
               // Create the upload callback handler that fires when the iframe
               // receives the load event.  Subsequently, the event handler is detached
               // and the iframe removed from the document.
               uploadCallback = function() {
                   if(callback && callback.timeout){
                       window.clearTimeout(oConn._timeOut[o.tId]);
                       delete oConn._timeOut[o.tId];
+                  }
                   // Fire global custom event -- completeEvent
                   oConn.completeEvent.fire(o, args);
                   if(o.completeEvent){
                       // Fire transaction custom event -- completeEvent
                       o.completeEvent.fire(o, args);
+                  }
                   obj = {
                       tId : o.tId,
                       argument : callback.argument
                   };
                   try
+                  {
                       // responseText and responseXML will be populated with the same data from the iframe.
                       // Since the HTTP headers cannot be read from the iframe
                       obj.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:io.contentWindow.document.documentElement.textContent;
                       obj.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
+                  }
                   catch(e){}
                   if(callback && callback.upload){
                       if(!callback.scope){
                           callback.upload(obj);
+                      }
                       else{
                           callback.upload.apply(callback.scope, [obj]);
+                      }
+                  }
                   // Fire global custom event -- uploadEvent
                   oConn.uploadEvent.fire(obj);
                   if(o.uploadEvent){
                       // Fire transaction custom event -- uploadEvent
                       o.uploadEvent.fire(obj);
+                  }
                   YE.removeListener(io, "load", uploadCallback);
                   setTimeout(
                       function(){
                           document.body.removeChild(io);
                           oConn.releaseObject(o);
                       }, 100);
               };
               // Bind the onload handler to the iframe to detect the file upload response.
               YE.addListener(io, "load", uploadCallback);
+          }
           YCM.setForm = _setForm;
           YCM.resetFormState = _resetFormState;
           YCM.createFrame = _createFrame;
           YCM.appendPostData = _appendPostData;
           YCM.uploadFile = _uploadFile;
       })();
       YAHOO.register("connection", YAHOO.util.Connect, {version: "2.8.0r4", build: "2449"});

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