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wb-archiv283/trunk/wb/include/yui/connection/connection.js @ 1359

-            doc
+/*
-            kweitzel
+Copyright (c) 2009, Yahoo! Inc. All rights reserved.
-            doc
+Code licensed under the BSD License:
 http://developer.yahoo.net/yui/license.txt
-            kweitzel
+version: 2.8.0r4
-            doc
+*/
 /**
  * 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)
+	{
-            kweitzel
+		var obj,http,i;
-            doc
+		try
+		{
 			// Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
 			http = new XMLHttpRequest();
 			//  Object literal with http and tId properties
-            kweitzel
+			obj = { conn:http, tId:transactionId, xhr: true };
             doc
 		catch(e)
+		{
-            kweitzel
+			for(i=0; i<this._msxml_progid.length; ++i){
-            doc
+				try
+				{
 					// Instantiates XMLHttpRequest for IE and assign to http
 					http = new ActiveXObject(this._msxml_progid[i]);
 					//  Object literal with conn and tId properties
-            kweitzel
+					obj = { conn:http, tId:transactionId, xhr: true };
-            doc
+					break;
+				}
-            kweitzel
+				catch(e1){}
             doc
+		}
 		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}
    */
-            kweitzel
+	getConnectionObject:function(t)
             doc
-            kweitzel
+		var o, tId = this._transaction_id;
             doc
 		try
+		{
-            kweitzel
+			if(!t){
-            doc
+				o = this.createXhrObject(tId);
+			}
 			else{
-            kweitzel
+				o = {tId:tId};
 				if(t==='xdr'){
 					o.conn = this._transport;
 					o.xdr = true;
+				}
 				else if(t==='upload'){
 					o.upload = true;
+				}
             doc
 			if(o){
 				this._transaction_id++;
+			}
+		}
 		catch(e){}
-            kweitzel
+		return o;
-            doc
+	},
   /**
    * @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)
+	{
-            kweitzel
+		var o,t,args = (callback && callback.argument)?callback.argument:null;
             doc
-            kweitzel
+		if(this._isFileUpload){
 			t = 'upload';
+		}
 		else if(callback.xdr){
 			t = 'xdr';
+		}
 		o = this.getConnectionObject(t);
-            doc
+		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.
-            kweitzel
+			if((method.toUpperCase() === 'POST' && this._use_default_post_header) && this._isFormSubmit === false){
-            doc
+				this.initHeader('Content-Type', this._default_post_header);
+			}
-            kweitzel
+			if(o.xdr){
 				this.xdr(o, method, uri, callback, postData);
 				return o;
+			}
 			o.conn.open(method, uri, true);
-            doc
+			//Initialize all default and custom HTTP headers,
 			if(this._has_default_headers || this._has_http_headers){
 				this.setHeader(o);
+			}
 			this.handleReadyState(o, callback);
-            kweitzel
+			o.conn.send(postData || '');
             doc
 			// 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)
+	{
-            kweitzel
+		var prop;
-            doc
+		// Enumerate through callback.customevents members and bind/subscribe
 		// events that match in the _customEvents table.
-            kweitzel
+		for(prop in callback.customevents){
-            doc
+			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)
+    {
-            kweitzel
+		var oConn = this,
 			args = (callback && callback.argument)?callback.argument:null;
             doc
 		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)
+    {
-            kweitzel
+		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;
             doc
 		try
+		{
-            kweitzel
+			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.
-            doc
+				httpStatus = o.conn.status;
+			}
-            kweitzel
+			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;
+			}
-            doc
+			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;
+		}
-            kweitzel
+		if((httpStatus >= 200 && httpStatus < 300) || httpStatus === 1223 || xdrS){
 			responseObject = o.xdr ? o.r : this.createResponseObject(o, args);
-            doc
+			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.
-            kweitzel
+					// XDR transactions will not resolve to this case, since the
 					// response object is already built in the xdr response.
-            doc
+					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:
-            kweitzel
+					responseObject = (o.xdr) ? o.response : this.createResponseObject(o, args);
-            doc
+					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)
+    {
-            kweitzel
+		var obj = {}, headerObj = {},
 			i, headerStr, header, delimitPos;
             doc
 		try
+		{
-            kweitzel
+			headerStr = o.conn.getAllResponseHeaders();
 			header = headerStr.split('\n');
 			for(i=0; i<header.length; i++){
 				delimitPos = header[i].indexOf(':');
-            doc
+				if(delimitPos != -1){
-            kweitzel
+					headerObj[header[i].substring(0,delimitPos)] = YAHOO.lang.trim(header[i].substring(delimitPos+2));
             doc
+			}
+		}
 		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)
+    {
-            kweitzel
+		var COMM_CODE = 0,
 			COMM_ERROR = 'communication failure',
 			ABORT_CODE = -1,
 			ABORT_ERROR = 'transaction aborted',
 			obj = {};
             doc
 		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;
             kweitzel
-            doc
+		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)
+	{
-            kweitzel
+		var prop;
-            doc
+		if(this._has_default_headers){
-            kweitzel
+			for(prop in this._default_headers){
-            doc
+				if(YAHOO.lang.hasOwnProperty(this._default_headers, prop)){
 					o.conn.setRequestHeader(prop, this._default_headers[prop]);
+				}
+			}
+		}
 		if(this._has_http_headers){
-            kweitzel
+			for(prop in this._http_headers){
-            doc
+				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;
 	},
   /**
-            kweitzel
+   * @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;
 	}();
   /**
-            doc
+   * @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..
    */
-            kweitzel
+	function _setForm(formId, isUpload, secureUri)
             doc
-            kweitzel
+		var oForm, oElement, oName, oValue, oDisabled,
 			hasSubmit = false,
 			data = [], item = 0,
 			i,len,j,jlen,opt;
-            doc
+		this.resetFormState();
 		if(typeof formId == 'string'){
 			// Determine if the argument is a form id or a form name.
-            kweitzel
+			// Note form name usage is deprecated by supported
 			// here for legacy reasons.
-            doc
+			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.
-            kweitzel
+			this.createFrame(secureUri?secureUri:null);
-            doc
+			// 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.
-            kweitzel
+		for (i=0,len=oForm.elements.length; i<len; ++i){
 			oElement  = oForm.elements[i];
-            doc
+			oDisabled = oElement.disabled;
-            kweitzel
+			oName     = oElement.name;
             doc
 			// Do not submit fields that are disabled or
 			// do not have a name attribute value.
 			if(!oDisabled && oName)
+			{
-            kweitzel
+				oName  = encodeURIComponent(oName)+'=';
 				oValue = encodeURIComponent(oElement.value);
-            doc
+				switch(oElement.type)
+				{
-            kweitzel
+					// Safari, Opera, FF all default opt.value from .text if
 					// value attribute not specified in markup
-            doc
+					case 'select-one':
-            kweitzel
+						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;
-            doc
+					case 'select-multiple':
-            kweitzel
+						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);
             doc
+							}
+						}
 						break;
 					case 'radio':
 					case 'checkbox':
 						if(oElement.checked){
-            kweitzel
+							data[item++] = oName + oValue;
             doc
 						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){
-            kweitzel
+								data[item++] = this._submitElementValue;
             doc
 							hasSubmit = true;
+						}
 						break;
 					default:
-            kweitzel
+						data[item++] = oName + oValue;
             doc
+			}
+		}
 		this._isFormSubmit = true;
-            kweitzel
+		this._sFormData = data.join('&');
             doc
 		this.initHeader('Content-Type', this._default_form_header);
 		return this._sFormData;
             kweitzel
             doc
-            kweitzel
+   /**
     * @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(){
-            doc
+		this._isFormSubmit = false;
 		this._isFileUpload = false;
 		this._formNode = null;
 		this._sFormData = "";
             kweitzel
             doc
-            kweitzel
+   /**
     * @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){
-            doc
+		// 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.
-            kweitzel
+		var frameId = 'yuiIO' + this._transaction_id,
 			io;
 		if(YAHOO.env.ua.ie){
-            doc
+			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);
             kweitzel
             doc
-            kweitzel
+   /**
     * @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('=');
-            doc
+			if(delimitPos != -1){
 				formElements[i] = document.createElement('input');
 				formElements[i].type = 'hidden';
-            kweitzel
+				formElements[i].name = decodeURIComponent(postMessage[i].substring(0,delimitPos));
 				formElements[i].value = decodeURIComponent(postMessage[i].substring(delimitPos+1));
-            doc
+				this._formNode.appendChild(formElements[i]);
+			}
+		}
 		return formElements;
             kweitzel
             doc
-            kweitzel
+   /**
     * @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){
-            doc
+		// Each iframe has an id prefix of "yuiIO" followed
 		// by the unique transaction id.
-            kweitzel
+		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;
             doc
 		// Track original HTML form attribute values.
-            kweitzel
+		rawFormAttributes = {
-            doc
+			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);
-            kweitzel
+		if(YAHOO.env.ua.ie && !ie8){
-            doc
+			// 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){
-            kweitzel
+			oElements = this.appendPostData(postData);
             doc
 		// 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){
-            kweitzel
+			for(i=0; i < oElements.length; i++){
-            doc
+				this._formNode.removeChild(oElements[i]);
+			}
+		}
 		// Restore HTML form attributes to their original
 		// values prior to file upload.
-            kweitzel
+		for(prop in rawFormAttributes){
-            doc
+			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.
-            kweitzel
+		uploadCallback = function() {
-            doc
+			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);
+			}
-            kweitzel
+			obj = {
 			    tId : o.tId,
 			    argument : callback.argument
             };
             doc
 			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);
+			}
-            kweitzel
+			YE.removeListener(io, "load", uploadCallback);
             doc
 			setTimeout(
 				function(){
 					document.body.removeChild(io);
 					oConn.releaseObject(o);
 				}, 100);
 		};
 		// Bind the onload handler to the iframe to detect the file upload response.
-            kweitzel
+		YE.addListener(io, "load", uploadCallback);
+	}
             doc
-            kweitzel
+	YCM.setForm = _setForm;
 	YCM.resetFormState = _resetFormState;
 	YCM.createFrame = _createFrame;
 	YCM.appendPostData = _appendPostData;
 	YCM.uploadFile = _uploadFile;
 })();
             doc
-            kweitzel
+YAHOO.register("connection", YAHOO.util.Connect, {version: "2.8.0r4", build: "2449"});