function nl() {
	var data = "email=" + document.getElementById("nl").value;

	var xhr_object = null;
	
	// Firefox
	if (window.XMLHttpRequest){
		xhr_object = new XMLHttpRequest(); 
	} else 
	// Explorer
	if (window.ActiveXObject){
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	xhr_object.open("POST", "themes/hachette/newsletter.php", true); 
	
	xhr_object.onreadystatechange = function () {

	if (xhr_object.readyState == 1){
			document.getElementById("nl_message").innerHTML = "enregistrement ...";
		}else
		if (xhr_object.readyState == 4){
			document.getElementById("nl_message").innerHTML = "<i>" + xhr_object.responseText + "</i>";
		}
	}
	
	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xhr_object.send (data);
}