var iFr;
function AdSenseLog()
 { 
    var theAd=""+ escape(window.status.substring(6)) ;
    var format=queryString('format',iFr.src);
    var channel=queryString('channel',iFr.src);
    var bug = new Image();
	// make sure [var pagename = "<%=Request.Servervariables("SCRIPT_NAME")%>"] is declared in the host page
    bug.src = '/astrack.asp?ref=' + document.referrer + '&url=' + theAd +'&title=' + pagename + '&format=' + format +'&channel='+channel ; 
}  
 
function queryString(item, source)
{
   var itemLoc=source.indexOf(item);
   var newSrc=source.substring(itemLoc);
   var endLoc=newSrc.indexOf("&");
   var lstSrc=newSrc.substring(0,endLoc);
   var itm=lstSrc.substring(item.length+1);
   if(itemLoc == -1) itm = "none"
  // alert(itemLoc + ' ' + newSrc + ' ' + endLoc + ' ' + lstSrc + ' ' + itm);
   return itm;
} 
 
 var elements; 
 elements = document.getElementsByTagName("iframe"); 

 for (var i = 0; i < elements.length; i++) 
 { 
   if(elements[i].src.indexOf('googlesyndication.com') > -1) 
   { 
     elements[i].attachEvent("onfocus",AdSenseLog) 
     iFr=elements[i];
   } 
 }