function request(url,mom) {
	var XHR = null;
	if(window.XMLHttpRequest)XHR = new XMLHttpRequest();
	else if(window.ActiveXObject)XHR = new ActiveXObject("Microsoft.XMLHTTP");
	else {alert("Votre navigateur ne supporte AJAX!");return;}
	XHR.open("POST",url,true);
	XHR.onreadystatechange = function attente() {
	if(XHR.readyState == 1)    
   {document.getElementById(mom).innerHTML = "Chargement en cours ....<img src='loading.gif' />";}
	if(XHR.readyState == 4){document.getElementById(mom).innerHTML = XHR.responseText;}}
	XHR.send(null);	return;}