// JavaScript Document
function checkEmail() {
var email = document.getElementById('e_mail');
var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/;
if (!filter.test(email.value)) {
alert('Votre address Email est invalide!');
email.focus
return false;
}
}