function valid_form_Fr(){
	var alerte = 'Le formulaire que vous venez de valider est incomplet, veuillez compléter les informations suivantes :\n\n\t';
	var email = document.form_contact_Fr.email.value;
	var nom = document.form_contact_Fr.nom.value;
	var prenom = document.form_contact_Fr.prenom.value;
	var telephone = document.form_contact_Fr.telephone.value;
	var message = document.form_contact_Fr.message.value;
	
	var error = false;
	
	var modele = /^[a-zA-Z0-9\.\-_]+@[a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,5}$/i;
	
	if(nom == ""){
		alerte = alerte + '* votre nom.\n\t';
		error = true;
	}
	if(prenom == ""){
		alerte = alerte + '* votre prénom.\n\t';
		error = true;
	}
	if(telephone == ""){
		alerte = alerte + '* votre téléphone.\n\t';
		error = true;
	}
	if((message == "") || (message == "mon message")){
		 alerte = alerte + '* votre message.\n\t';
		 error = true;
	}
	if(email == ""){
		alerte = alerte + '* votre email.\n\t';
		error = true;
	}
	else{
		if (!modele.test(email)){
			error = true;
			alerte = "Votre adresse email est invalide !";
		}
	}		
	
	if(error == true) { alert(alerte); }
	else { document.form_contact_Fr.submit(); }
}
function valid_form_En(){
	var alerte = 'The form that you have just validated is incomplete, want to supplement following information:\n\n\t';
	var email = document.form_contact_En.email.value;
	var nom = document.form_contact_En.nom.value;
	var prenom = document.form_contact_En.prenom.value;
	var telephone = document.form_contact_En.telephone.value;
	var message = document.form_contact_En.message.value;
	
	var error = false;
	
	var modele = /^[a-zA-Z0-9\.\-_]+@[a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,5}$/i;
	
	if(nom == ""){
		alerte = alerte + '* your nane.\n\t';
		error = true;
	}
	if(prenom == ""){
		alerte = alerte + '* your firstname.\n\t';
		error = true;
	}
	if(telephone == ""){
		alerte = alerte + '* your telephone.\n\t';
		error = true;
	}
	if((message == "") || (message == "my message")){
		 alerte = alerte + '* your message.\n\t';
		 error = true;
	}
	if(email == ""){
		alerte = alerte + '* your e-mail.\n\t';
		error = true;
	}
	else{
		if (!modele.test(email)){
			error = true;
			alerte = "Your address e-mail is invalid!";
		}
	}		
	
	if(error == true) { alert(alerte); }
	else { document.form_contact_En.submit(); }
}