var xmlhttp

function loadXMLDoc(url)
{
xmlhttp=null
// code for Mozilla, etc.
if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest()
  }
// code for IE
else if (window.ActiveXObject)
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
  }
if (xmlhttp!=null)
  {
  purl = "http://www.cambioaria.it/clickcont.php?link="+url;
  xmlhttp.onreadystatechange = state_Change;
  xmlhttp.open("GET",purl,true);
  xmlhttp.send(null);
}}

function state_Change()
{if (xmlhttp.readyState > 0)
{}
if (xmlhttp.readyState == 4){}}