function GetXmlHttpObject()
{	
	var request=null;
	if (window.XMLHttpRequest){
		// code for IE7+, Firefox, Chrome, Opera, Safari
		request= new XMLHttpRequest;
	}
	else if (window.ActiveXObject){
		// code for IE6, IE5
		request= new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	if(request==null){
		alert ("Your browser does not support AJAX!");
		return;
	}
	return request;
}

function loadXMLString(txt)
{
	if (window.DOMParser){
		parser=new DOMParser();
		xmlDoc=parser.parseFromString(txt,"text/xml");
	}
	else{ // Internet Explorer
		xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
		xmlDoc.async="false";
		xmlDoc.loadXML(txt);
	}
	return xmlDoc;
}