mypackage_wrt/WRTKit/UI/Ajax.js
author victorp@symbian.org
Fri, 30 Apr 2010 15:01:03 +0100
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/*
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� Copyright 2008 Nokia Corporation. All rights reserved.
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IMPORTANT:  The Nokia software ("WRTKit and Example Widget files") is supplied to you by Nokia
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Corporation (�Nokia�) in consideration of your agreement to the following terms. Your use, installation
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and/or redistribution of the WRTKit and Example Widget files constitutes acceptance of these terms. If
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you do not agree with these terms, please do not use, install, or redistribute the WRTKit and Example
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Widget files.
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In consideration of your agreement to abide by the following terms, and subject to these terms, Nokia
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grants you a personal, non-exclusive license, under Nokia�s copyrights in the WRTKit and Example
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Widget files, to use, reproduce, and redistribute the WRTKit and Example files, in text form (for HTML,
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CSS, or JavaScript files) or binary form (for associated images), for the sole purpose of creating S60
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Widgets.
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If you redistribute the WRTKit and Example files, you must retain this entire notice in all such
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redistributions of the WRTKit and Example files.
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You may not use the name, trademarks, service marks or logos of Nokia to endorse or promote products
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that include the WRTKit and Example files without the prior written explicit agreement with Nokia.
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Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by
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Nokia herein, including but not limited to any patent rights that may be infringed by your products that
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incorporate the WRTKit and Example files or by other works in which the WRTKit and Example files
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may be incorporated.
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The WRTKit and Example files are provided on an "AS IS" basis.  NOKIA MAKES NO
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WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
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WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE, REGARDING THE EXAMPLES OR ITS USE AND OPERATION
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ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL NOKIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, AND/OR
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DISTRIBUTION OF THE EXAMPLES, HOWEVER CAUSED AND WHETHER UNDER THEORY
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OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE,
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EVEN IF NOKIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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///////////////////////////////////////////////////////////////////////////////
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// Ajax utility calss to create XmlHttpRequest object
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function Ajax() 
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{
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	//	xmlHttpRequest object	
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	var request = null;
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    // branch for native XMLHttpRequest object
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    if(window.XMLHttpRequest && !(window.ActiveXObject)) {
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    	try 
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		{
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			request = new XMLHttpRequest();
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			try
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			{
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				//	attach the Bypass code, if the browser is firefox
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				if(netscape.security.PrivilegeManager.enablePrivilege)
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				{
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					//	duplicate the function
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					request._open = request.open;
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					//	redefine the function definition
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					request.open = function(method, url, flag)
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					{
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						try
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						{
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							// Enable Universal Browser Read
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							netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
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							//	call the native XmlHttpRequest.open method
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							this._open(method, url, flag);
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						}catch(e)
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						{
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							//	call the native XmlHttpRequest.open method
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							this._open(method, url, flag);
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						}
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					}
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				}
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			}
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			catch(e)
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			{
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				//	eatup all exceptions
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			}
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		} 
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		catch(e) {
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			request = null;
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        }
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    // branch for IE/Windows ActiveX version
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    } else if(window.ActiveXObject) {
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       	try {
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        	request = new ActiveXObject("Msxml2.XMLHTTP");
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      	} catch(e) {
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        	try {
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          		request = new ActiveXObject("Microsoft.XMLHTTP");
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        	} catch(e) {
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          		alert('Failed to create XmlHttprequest');
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				return null;
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        	}
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		}
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    }
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	return (request);
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}