function chdoubles(adu,enf){
try {xhrdpds=new XMLHttpRequest();}
	catch(e){
		try {xhrdpds=new ActiveXObject("Microsoft.XMLHTTP");}
			catch(e1){
				alert("Objet non supporté");
			}
	}
xhrdpds.onreadystatechange=function(){
	if (xhrdpds.readyState==4)
		document.getElementById("chdoubles").innerHTML=xhrdpds.responseText;
	else 
		document.getElementById("chdoubles").innerHTML="<font size='1'>Patientez svp...</font>";
		}
xhrdpds.open('post','chdoubles.php',true);
xhrdpds.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
//xhr.send(null);
xhrdpds.send("enf="+enf+"&adu="+adu);

}