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pega_yui_connection.js
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/*
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.5.1
*/
/**
* 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 pega.util
* @module connection
* @requires pega
* @requires event
*/
/**
* The Connection Manager singleton provides methods for creating and managing
* asynchronous transactions.
*
* @class Connect
*/
pega.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 Property modified by setForm() to determine if the data
* should be submitted as an HTML form.
* @property _isFormSubmit
* @private
* @static
* @type boolean
*/
_isFormSubmit: false,
/**
* @description Property modified by setForm() to determine if a file(s)
* upload is expected.
* @property _isFileUpload
* @private
* @static
* @type boolean
*/
_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
*/
_formNode: null,
/**
* @description Property modified by setForm() to set the HTML form data
* for each transaction.
* @property _sFormData
* @private
* @static
* @type string
*/
_sFormData: null,
/**
* @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: 20,
/**
* @description A transaction counter that increments the transaction id for each transaction.
* @property _transaction_id
* @private
* @static
* @type int
*/
_transaction_id: 0,
/**
* @description Tracks the name-value pair of the "clicked" submit button if multiple submit
* buttons are present in an HTML form; and, if pega.util.Event is available.
* @property _submitElementValue
* @private
* @static
* @type string
*/
_submitElementValue: null,
/**
* @description Determines whether pega.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
*/
_hasSubmitListener: (function() {
if (pega.util.Event) {
pega.util.Event.addListener(
document,
'click',
function(e) {
var obj = pega.util.Event.getTarget(e);
if (obj.nodeName.toLowerCase() == 'input' && (obj.type && obj.type.toLowerCase() == 'submit')) {
pega.util.Connect._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
}
});
return true;
}
return false;
})(),
/**
* @description Custom event that fires at the start of a transaction
* @property startEvent
* @private
* @static
* @type CustomEvent
*/
startEvent: new pega.util.CustomEvent('start'),
/**
* @description Custom event that fires when a transaction response has completed.
* @property completeEvent
* @private
* @static
* @type CustomEvent
*/
completeEvent: new pega.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 pega.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 pega.util.CustomEvent('failure'),
/**
* @description Custom event that fires when handleTransactionResponse() determines a
* response in the HTTP 4xx/5xx range.
* @property failureEvent
* @private
* @static
* @type CustomEvent
*/
uploadEvent: new pega.util.CustomEvent('upload'),
/**
* @description Custom event that fires when a transaction is successfully aborted.
* @property abortEvent
* @private
* @static
* @type CustomEvent
*/
abortEvent: new pega.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;
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
};
} catch (e) {
for (var 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
};
break;
} catch (e) {}
}
} 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(isFileUpload) {
var o;
var tId = this._transaction_id;
try {
if (!isFileUpload) {
o = this.createXhrObject(tId);
} else {
o = {};
o.tId = tId;
o.isUpload = true;
}
if (o) {
this._transaction_id++;
}
} catch (e) {} finally {
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, bAsync) {
var _async = true;
var o = (this._isFileUpload) ? this.getConnectionObject(true) : this.getConnectionObject();
var args = (callback && callback.argument) ? callback.argument : null;
if (!o) {
return null;
} else {
// Intialize any transaction-specific custom events, if provided.
if (callback && callback.customevents) {
this.initCustomEvents(o, callback);
}
// setup error handler for abort/cancel (see bug-216390) - must be set before open?
if (o.conn && o.conn.addEventListener) {
o.conn.addEventListener("abort", function(evt) {
pega.util.Connect.handleError(evt, o, args, callback);
}, false);
}
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();
}
if (bAsync === false) {
_async = false;
}
o.conn.open(method, uri, _async);
// 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);
//Bug-29567, Set the content-type to text/xml if the postData has xml in it.
//For performance reasons, the search for xml header is performed in the first 10 characters only.
if (postData != null) {
var headerSet = false;
if (typeof postData == "string") {
var headerData = postData.substring(0, 10);
if (headerData.indexOf("<?xml") != -1) {
this.initHeader('Content-Type', "text/xml");
headerSet = true;
}
}
if (!headerSet)
this.initHeader('Content-Type', "application/x-www-form-urlencoded");
}
}
//Initialize all default and custom HTTP headers,
if (this._has_default_headers || this._has_http_headers) {
this.setHeader(o);
}
// Set timeout if any
if (callback && callback.timeout) {
o.conn.timeout = callback.timeout;
}
o.conn.ontimeout = this.abort.bind(this, o, callback, true);
o.conn.onreadystatechange = this.handleReadyState.bind(this, o, callback);
o.startTime = Date.now();
if (pega && pega.ui && pega.ui.statetracking) pega.ui.statetracking.setHttpBusy(o.tId, true);
if(window.gIsMultiTenantPortal){
o.conn.withCredentials = true;
}
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) {
// Enumerate through callback.customevents members and bind/subscribe
// events that match in the _customEvents table.
for (var prop in callback.customevents) {
if (this._customEvents[prop][0]) {
// Create the custom event
o[this._customEvents[prop][0]] = new pega.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 handler for abort or error exit from the transaction, see bug-216390
* @method handleError
*/
handleError: function(evt, o, args, callback) {
if (pega && pega.ui && pega.ui.statetracking) pega.ui.statetracking.setHttpDone(o.tId, Date.now() - o.startTime);
// prevent retry
if (pega.u && pega.u.d)
pega.u.d.ajaxFailureSecondaryCount = -1;
window.ajaxRequestFail = true;
var responseObject = pega.util.Connect.createExceptionObject(o.tId, args, evt.type == "abort");
if (callback && callback.failure) {
if (!callback.scope) {
callback.failure(responseObject);
} else {
callback.failure.apply(callback.scope, [responseObject]);
}
}
},
/**
* @description This method binds 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;
var args = (callback && callback.argument) ? callback.argument : null;
if (o.conn.readyState == 4) {
if (pega && pega.ui && pega.ui.statetracking) pega.ui.statetracking.setHttpDone(o.tId, Date.now() - o.startTime);
// Fire global custom event -- completeEvent
oConn.completeEvent.fire(o, args);
// Fire transaction custom event -- completeEvent
o.completeEvent && o.completeEvent.fire(o, args);
oConn.handleTransactionResponse(o, callback);
}
},
/**
* @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;
var args = (callback && callback.argument) ? callback.argument : null;
try {
if (o.conn.status !== undefined && o.conn.status !== 0) {
httpStatus = o.conn.status;
} 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) {
responseObject = this.createResponseObject(o, args);
responseObject.httpStatus = httpStatus;
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]);
}
} else {
/* BUG-109111: added logic for redirect to login screen in case of invalid/timedout session */
try {
if (responseObject && responseObject.responseText && pega && pega.u && pega.u.d && pega.u.d.showLoginScreen) {
pega.u.d.showLoginScreen(responseObject.responseText);
}
} catch (e) {}
}
// 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.
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 = 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 = {};
var headerObj = {};
try {
var headerStr = o.conn.getAllResponseHeaders();
var header = headerStr.split('\n');
for (var i = 0; i < header.length; i++) {
var delimitPos = header[i].indexOf(':');
if (delimitPos != -1) {
headerObj[header[i].substring(0, delimitPos)] = 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;
var COMM_ERROR = 'communication failure';
var ABORT_CODE = -1;
var ABORT_ERROR = 'transaction aborted';
var 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) {
if (this._has_default_headers) {
for (var prop in this._default_headers) {
if (pega.lang.hasOwnProperty(this._default_headers, prop)) {
o.conn.setRequestHeader(prop, this._default_headers[prop]);
}
}
}
if (this._has_http_headers) {
for (var prop in this._http_headers) {
if (pega.lang.hasOwnProperty(this._http_headers, prop)) {
o.conn.setRequestHeader(prop, this._http_headers[prop]);
}
}
delete this._http_headers;
this._http_headers = {};
this._has_http_headers = false;
}
//always add activeCSRFToken to the header
//BUG-437497
//US-239944 - Added parent's csrf token for MDC and DCSPA cases.
if((pega.u.d && (pega.u.d.isFlowinModalProgress || pega.u.d.bIsFlowInModal || pega.u.d.bIsDCSPA)) || pega.ctx.isMDC){
var topHarnessContext = pega.ctxmgr.getRootDocumentContext();
if(topHarnessContext){
o.conn.setRequestHeader("pzCTkn", topHarnessContext.activeCSRFToken);
}
else if(pega.ctx.activeCSRFToken){
o.conn.setRequestHeader("pzCTkn", pega.ctx.activeCSRFToken);
}
}
else{
o.conn.setRequestHeader("pzCTkn", pega.ctx.activeCSRFToken);
}
o.conn.setRequestHeader("pzBFP", pega.d.browserFingerprint);
},
/**
* @description Resets the default HTTP headers object
* @method resetDefaultHeaders
* @public
* @static
* @return {void}
*/
resetDefaultHeaders: function() {
delete this._default_headers;
this._default_headers = {};
this._has_default_headers = 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..
*/
setForm: function(formId, isUpload, secureUri) {
// reset the HTML form data and state properties
this.resetFormState();
var oForm;
if (typeof formId == 'string') {
// Determine if the argument is a form id or a form name.
// Note form name usage is deprecated, but supported
// here for backward compatibility.
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.
var io = this.createFrame((window.location.href.toLowerCase().indexOf("https") === 0 || secureUri) ? true : false);
// Set form reference and file upload properties to true.
this._isFormSubmit = true;
this._isFileUpload = true;
this._formNode = oForm;
return;
}
var oElement, oName, oValue, oDisabled;
var hasSubmit = false;
// Iterate over the form elements collection to construct the
// label-value pairs.
for (var i = 0; i < oForm.elements.length; i++) {
oElement = oForm.elements[i];
oDisabled = oElement.disabled;
oName = oElement.name;
oValue = oElement.value;
// Do not submit fields that are disabled or
// do not have a name attribute value.
if (!oDisabled && oName) {
switch (oElement.type) {
case 'select-one':
case 'select-multiple':
for (var j = 0; j < oElement.options.length; j++) {
if (oElement.options[j].selected) {
if (window.ActiveXObject) {
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oElement.options[j].attributes['value'].specified ? oElement.options[j].value : oElement.options[j].text) + '&';