var xmlHttp

function logClick(Id,Size) { 
 xmlHttp=GetAdvertXmlHttpObject();
 if (xmlHttp==null) {
  alert ("Browser does not support HTTP Request");
  return;
 }
 var url="/advertLog.php";
 url=url+"?id="+Id;
 url=url+"&size="+Size; 
 xmlHttp.onreadystatechange=AdvertStateChanged 
 xmlHttp.open("GET",url,true)
 xmlHttp.send(null)
}

function AdvertStateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 
 } 
}

function GetAdvertXmlHttpObject() {
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}