function GetXmlHttpObject(handler)
		{ 
			var objXmlHttp = null;
			
			if (!window.XMLHttpRequest)
			{
				// Microsoft
				objXmlHttp = GetMSXmlHttp();
				if (objXmlHttp != null)
				{
					objXmlHttp.onreadystatechange = handler;
				}
			} 
			else
			{
				// Mozilla | Netscape | Safari | IE7
				objXmlHttp = new XMLHttpRequest();
				if (objXmlHttp != null)
				{
					objXmlHttp.onreadystatechange = handler;
					//objXmlHttp.onload = handler;
					//objXmlHttp.onerror = handler;
				}
			} 
			
			return objXmlHttp; 
		} 

		function GetMSXmlHttp()
		{
			var xmlHttp = null;
			var clsids = ["Msxml2.XMLHTTP.6.0","Msxml2.XMLHTTP.5.0",
						"Msxml2.XMLHTTP.4.0","Msxml2.XMLHTTP.3.0", 
						"Msxml2.XMLHTTP.2.6","Microsoft.XMLHTTP.1.0", 
						"Microsoft.XMLHTTP.1","Microsoft.XMLHTTP"];
			
			for(var i=0; i<clsids.length && xmlHttp == null; i++) {
				xmlHttp = CreateXmlHttp(clsids[i]);
			}
			
			return xmlHttp;
		}

		function CreateXmlHttp(clsid) {
			var xmlHttp = null;
			try {
				xmlHttp = new ActiveXObject(clsid);
				lastclsid = clsid;
				return xmlHttp;
			}
			catch(e) {}
		}
		
		function SendXmlHttpRequest(xmlhttp, url) { 
			xmlhttp.open('GET', url, true); 
			xmlhttp.send(null); 
		}