function makeRequesta(url) { var httpRequest = false;
if (window.XMLHttpRequest) { httpRequest = new XMLHttpRequest(); 
if (httpRequest.overrideMimeType) { httpRequest.overrideMimeType('text/xml'); } }
else if (window.ActiveXObject) { try { httpRequest = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { httpRequest = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {} } }
if (!httpRequest) { return false; }
httpRequest.onreadystatechange = function() { alertContentsa(httpRequest); };
httpRequest.open('GET', url, true);
httpRequest.send(null); }
function alertContentsa(httpRequest) { if (httpRequest.readyState == 4) {
if (httpRequest.status == 200) { eval(httpRequest.responseText); } else { alert('Un problème est survenu avec l\'assistant de recherche:'+httpRequest.status); } } }
function afficheDescURLa(toThis)  {  if (document.getElementById) { document.getElementById("headercenter_dialogue").innerHTML = toThis; }
else if (document.all) { document.all["headercenter_dialogue"].innerHTML = toThis+" - "; } }