function ahah()
		{
		   var url = 'allhtml.php';
		   if (window.XMLHttpRequest)
		   {
		       req = new XMLHttpRequest();
		       req.onreadystatechange = function() {ahahDone();};
		       req.open("GET", url, true);
		       req.send(null);
		   }
		   else if (window.ActiveXObject)  // IE/Windows ActiveX version
		   {
		       req= new ActiveXObject("Microsoft.XMLHTTP");
		       if (req)
			   {
		           req.onreadystatechange = function() {ahahDone();};
		           req.open("GET", url, true);
		           req.send();
		       }
		   }
		}

		function ahahDone()
		{
		   if (req.readyState == 4) // only if req is "loaded"
		   {
			   if (req.status == 200 || req.status == 304) // only if "OK"
			   {
				   document.location.href="accueil.php";
		       }
		   }
		}