var URL = "http://www.proto-garage.com/clients/Reevolo/Analytics/analytics/online/online.php" + "?refer=" + window.location.href;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
		URL = "http://www.proto-garage.com/clients/Reevolo/Analytics/analytics/online/online.php" + "?refer=" + window.location.href;
    }
  }

xmlhttp.open("GET",URL,true);
xmlhttp.send();