public ActionResult _CancelConfirmed(int reservationId)
        {
            //vérification hack javascript...
            Reservation reservation = ReservationManager.GetReservationsFromId(reservationId);

            if (reservation.Cancelled ||
                reservation.FirstNight.Date <= DateTime.Now.Date ||
                reservation.IdReservation == 0 ||
                ReservationManager.CancelReservationFromId(reservationId)
                )
            {
                RedirectToAction("_CancelFailed", "Reservation");
            }

            return(PartialView());
        }