function chiffres(event) {
	// Compatibilité IE / Firefox
	if(!event&&window.event) {
		event=window.event;
	}
	// IE
	if(event.keyCode < 48 || event.keyCode > 57) {
		event.returnValue = false;
		event.cancelBubble = true;
	}
	// DOM
	if(event.which < 48 || event.which > 57) {
		event.preventDefault();
		event.stopPropagation();
	}
}



function alphanum(evt) {
	var keyCode = evt.which ? evt.which : evt.keyCode;
	var interdit = 'àâäãçéèêëìîïòôöõùûüñ &*?!:;,\t#~"^¨%$£?²¤§%*()[]{}<>|\\/`\'';
	if (interdit.indexOf(String.fromCharCode(keyCode)) >= 0) {
		return false;
	}
}

function redirect(url)
{
  window.location.href = url;
  return true;
}