var xhr_object_2 = null;  
var data;
function compteur(maj){ 
if(maj==1){
maj="mail"	;
} else if(maj==2){
maj="print"	;
} else if(maj==3){
maj="favoris";
}


	if(window.XMLHttpRequest) // Firefox   
	    xhr_object_2 = new XMLHttpRequest();   
	 else if(window.ActiveXObject) // Internet Explorer   
	    xhr_object_2 = new ActiveXObject("Microsoft.XMLHTTP");   
	 else { // XMLHttpRequest non supporté par le navigateur   
	    alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");   
	    return;   
	 }   
	   
	 xhr_object_2.open("POST", "compteur.php", true);  
	 
	 data ="maj="+maj;  
	 xhr_object_2.onreadystatechange = function() {   
	    if(xhr_object_2.readyState == 4)  ;   
	 }   
	 xhr_object_2.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	 xhr_object_2.send(data); 
	 
}