function ajax_rq(url,id,loader)
{
var xhr_object = null;
var position = id;

var date = new Date();
var timestamp = date.getTime();

if(window.XMLHttpRequest) xhr_object = new XMLHttpRequest();
else
if (window.ActiveXObject) xhr_object = new ActiveXObject("Microsoft.XMLHTTP");

// On ouvre la requete vers la page dsire
xhr_object.open("GET", url+"&time="+timestamp, true);

if(loader == null) {
 document.getElementById(position).innerHTML = "<img id=\"loading\" src=\"../img/ajax-loader.gif\" alt=\"loading...\" />";
}
else {
 document.getElementById(position).innerHTML = "";	
}

xhr_object.onreadystatechange = function(){
if ( xhr_object.readyState == 4 )
 {
// j'affiche dans la DIV specifiee le contenu retourne par le fichier
document.getElementById(position).innerHTML = xhr_object.responseText;
			if (xhr_object.status == 200) {
			//alert(xhr_object.responseText);
				if(!url.match('amazon.php')) {
				_gaq.push(['_trackPageview', url]);
				}
			}
			
}
}
// dans le cas du get
 xhr_object.send(null);

}