function test_req(referer,id) 
{
	var filename = "pg_avant_gains33.php"+u; 	var xhr_object = null; 
		 
	if(window.XMLHttpRequest) xhr_object = new XMLHttpRequest(); // Firefox 
	else if(window.ActiveXObject) xhr_object = new ActiveXObject("Microsoft.XMLHTTP"); // Internet Explorer 
	else return; // XMLHttpRequest non supporté par le navigateur 

	if (typeof(window.innerHeight)=='number') {var haut=window.innerHeight;var larg = window.innerWidth;}
   else 
	{
     if (document.documentElement && document.documentElement.clientHeight) 
		{var haut = document.documentElement.clientHeight;var larg = document.documentElement.clientWidth;}
   else 
	{
     if (document.body&&document.body.clientHeight) {var larg = document.body.clientWidth;var haut=document.body.clientHeight;}
   }
   }

	var method="POST"; var data=null;var variable=id;
	if(referer=='')referer=document.referrer;
	data = "larg="+larg+"&haut="+haut+"&referer="+referer+"&variable="+variable; 
		
	xhr_object.open(method, filename, true); 
	xhr_object.onreadystatechange = function() 
	{ 
		if(xhr_object.readyState == 4 && document.getElementById(id)) document.getElementById(id).innerHTML = xhr_object.responseText;
	}	 
		 
	if(method == "POST") xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 
	xhr_object.send(data); 
}