temoins = setInterval("refresh()", 5000);
code = true;
	function getXhr()
    {
    	var xhr = null;
        if(window.XMLHttpRequest) // Firefox et autres
        	xhr = new XMLHttpRequest();
       else if(window.ActiveXObject)// Internet Explorer
       {
       try
      	   { xhr = new ActiveXObject("Msxml2.XMLHTTP"); }
   	   catch (e)
           { xhr = new ActiveXObject("Microsoft.XMLHTTP"); }
       }
       else  // XMLHttpRequest non supporté par le navigateur
           {
       	   alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
           xhr = false;
        }
        return xhr;
    }
    
    function refresh(){
	    var xhr = getXhr();
	    xhr.onreadystatechange = function(){
	            if(xhr.readyState == 4 && xhr.status == 200){
	            	if(code)
	                    document.getElementById('temoins').innerHTML=xhr.responseText;
	                else
	                	document.getElementById('raison').innerHTML=xhr.responseText;
	            }
	    }
	    if(code)
	    	type=1;
	    else
	    	type=0;
	    
	    code = !code;
	    var post="type="+type;
	    xhr.open("POST","/libs_ajax/refresh.php",true);
	    xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	    xhr.send(post);
    }