function callStatistic(aid, atype)
{
 var url="/service/stat.php?aid="+aid+"&atype="+atype;
 loadXml(url);
 return true;
}

function loadXml(url)
{
 // branch for native XMLHttpRequest object
 var req;
 if (window.XMLHttpRequest)
 {
  req=new XMLHttpRequest();
  req.onreadystatechange=responseXML;
  req.open("GET", url, true);
  req.send(null);
 // branch for IE/Windows ActiveX version
 } else {
  if (window.ActiveXObject)
  {
   req=new ActiveXObject("Microsoft.XMLHTTP");
   if (req)
   {
    req.onreadystatechange=responseXML;
    req.open("GET", url, true);
    req.send();
   }else {
     alert("XML HTTP");
   }
  } 
 }
 return req;
}

function responseXML()
{
  return "";
}