function refData(link, ricevente, dominio)
{
	
    if (window.XMLHttpRequest) // Mozilla, Safari,...
    { 
    	xmlhttp = new XMLHttpRequest();
    } 
    else if (window.ActiveXObject) // IE
    { 
    	xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    
	if (dominio == undefined){
		dominio = "http://speciali.leonardo.it/";
	}
      xmlhttp.open('POST', dominio+'script/savetrack.php?url='+link+'&dove='+ricevente, true);

      //alert('http://speciali.leonardo.it/script/savetrack.php?url='+link+'&dove='+ricevente);
      /* The callback function */
	//target.submit();
	/*
      xmlhttp.onreadystatechange = function() {
          if (xmlhttp.readyState == 4) 
          {
              if (xmlhttp.status == 200) 
              {
              	alert(xmlhttp.responseText);
              } //else {
                 // target.submit();
                //} 
          }
      }
      */
      /* Send the POST request */
      xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
      xmlhttp.send('');	
}