var jour = 1000 * 60 * 60 * 24

function Delta_jrs (dold, dnew) {

	var now = dnew? dnew : new Date();
	var diff = now.getTime() - dold.getTime();
	return Math.floor(diff / jour);
}

function Futur (strdatev) {
	var now = new Date();
	return now.getTime() < ((new Date(strdatev)).getTime() + jour);
}