function addEmailNewsletter(email, langue) {

	var http_request = initAjax();
	var url = '/add_newsletter.php';
	var param = 'email=' + email + '&langue=' + langue;

	http_request.onreadystatechange = function() { showMessage(http_request); }

	http_request.open('POST', url, true);
	http_request.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	http_request.send(param);
}


function showMessage(http_request) {

	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			var mess = http_request.responseText;
			alert(mess);
		} else {
			alert('There was a problem with the request.');
		}
	}
}