function form_newsletter_onsubmit() {
		
	if(document.form_newsletter.newsletter_name.value == "") {   
		window.alert("Veuillez saisir le Nom.");
		document.form_newsletter.newsletter_name.focus();
		return(false);
	}
	if(document.form_newsletter.newsletter_name.value !== "") {
		if (!isNaN(document.form_newsletter.newsletter_name.value)) {
			window.alert("Veuillez saisir le Nom en Lettres.");
			document.form_newsletter.newsletter_name.focus();
       		return false;
		}
	}
	if(document.form_newsletter.newsletter_mail.value == "") {
			window.alert("Veuillez saisir votre E-mail.");
			document.form_newsletter.newsletter_mail.focus();
			return(false);
		}	
	if(document.form_newsletter.newsletter_mail.value != "") {
		var x = document.form_newsletter.newsletter_mail.value;
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
			if (!filter.test(x)){
				alert('NON! Votre Email est Invalide');
				document.form_newsletter.newsletter_mail.focus();
			return(false);
			}
	}
	
	
}