var xmlHttp = createXmlHttpRequestObject();


function createXmlHttpRequestObject()
	{
	var xmlHttp;
	
	try
			{
			xmlHttp = new XMLHttpRequest();
			}
	
	catch(e)
			{
			var XmlHttpVersions = new Array ('MSXML2.XMLHTTP.6.0',
											 'MSXML2.XMLHTTP.5.0',
											 'MSXML2.XMLHTTP.4.0',
											 'MSXML2.XMLHTTP.3.0',
											 'MSXML2.XMLHTTP',
											 'Microsoft.XMLHTTP');
			
				for(var i=0;i<XmlHttpVersions.length && !xmlHttp;i++)
					{
						try
							{
							xmlHttp = new ActiveXObject(XmlHttpVersions[i]);
							}
					
				catch(e) {};	
					}
			}
		 
	 if(!xmlHttp)
	 	{
		alert("Error creating the XMLHTTPRequest object.");
		}
	  else
	   return xmlHttp;
	 }