function request(r,df){
	var url= "&" +((location.toString().indexOf("?")<0)?"":location.toString().split("?")[1]);
	var re=(url.indexOf("&" +r+"=")<0)?"":url.split("&" +r+"=")[1].split("&")[0];
	return (re=="")?((df==null)?"":df):re;
}
if (window.XMLHttpRequest) 
{ 
    http_request = new XMLHttpRequest();
}
else if (window.ActiveXObject) 
{
    http_request = new ActiveXObject("Microsoft.XMLHTTP");
}
var linkurl="/Ajax_User.aspx?AdID="+request('AdID','0')+"&UnionID="+request('UnionID','0')+"&UnionIDB="+request('UnionIDB','0')+"&date="+ new Date;

http_request.open("GET",linkurl,false);
http_request.send(null);