function ajax(){
	document.getElementById('motPres').innerHTML='<div style="text-align:center;margin:auto;"><img src="userfiles/defaut/wait1.gif" alt="Load" title="Load"/></div>'
	if(window.XMLHttpRequest)
	{ // Firefox 
		   xhrConn = new XMLHttpRequest(); 
	}
	else if(window.ActiveXObject)
	{ // Internet Explorer 
				try{
	                xhrConn = new ActiveXObject("Msxml2.XMLHTTP");
	            } catch (e) {
	                xhrConn = new ActiveXObject("Microsoft.XMLHTTP");
	            }
	}
		 
	if(!xhrConn)
	{ // XMLHttpRequest non supporté par le navigateur 
	   alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
	   xhrConn = false; 
	}

	xhrConn.onreadystatechange  = function()
	{
		try{
			 if(xhrConn.readyState  == 4)
			 {
				  if(xhrConn.status  == 200)
					if(document.getElementById('motPres'))
						document.getElementById('motPres').innerHTML=xhrConn.responseText;
			}
		}
		catch(e){
		}
	}/*
	xhr.open(method,url, true); 
	xhr.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
	xhr.send(null);*/	
	
	complet="type=PRES";
	//alert(complet);
	
	xhrConn.open("POST", "motDuPres/ajax.php", true);
	xhrConn.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 	 
	xhrConn.send(complet); 	
}