function createObject() {
	var request_type;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
		request_type = new ActiveXObject("Microsoft.XMLHTTP");
	}else{
		request_type = new XMLHttpRequest();
	}
	return request_type;
}

var http = createObject();

function newsing() {
	// Optional: Show a waiting message in the layer with ID ajax_response
	//document.getElementById('login_response').innerHTML = "Loading..."
	
	// Required: verify that all fileds is not empty. Use encodeURI() to solve some issues about character encoding.
	var nom = document.getElementById('nom').value;
	var prenom = document.getElementById('prenom').value;
	var email = document.getElementById('email').value;
	
	// Pass the login variables like URL variable
	//http.open('get', 'newsletter.php');
	http.open('get', 'newsletter.php?nom='+nom+'&prenom='+prenom+'&email='+email);
	http.onreadystatechange = loginReply;
	http.send(null);
}

function loginReply() {
	if(http.readyState == 4){
		news.envoi();
	}
}