function validFormulaire() {

	var nom = document.forms[0].nom.value;
	var prenom = document.forms[0].prenom.value;
	var email = document.forms[0].email.value;
	var sujet = document.forms[0].sujet.value;
	var contenu = document.forms[0].contenu.value;

	if (!nom || !prenom || !email || !sujet || !contenu) {
		alert ("Vous devez saisir l\'ensemble\ndes champs obligatoires !");
	}
	else {
		document.formulaire.submit();
		//document.forms[0].submit();
	}
}


function bordform(obj) {
	obj.style.border = "2px solid #f8af8c";
}

function bordreset(obj) {
	obj.style.border = "";
}

function bouton_survol() {
	document.getElementById('bt_submit').style.color = "#D34501" ;
	document.getElementById('bt_submit').style.backgroundColor = "#FFF" ;
}

function bouton_finsurvol() {
	document.getElementById('bt_submit').style.color = "#000" ;
	document.getElementById('bt_submit').style.backgroundColor = "" ;
}