public ActionResult BillScheduleUpdate(ATMPayBillsSchedule_ViewModel models, string id)
        {
            int sessionUserID = WebSecurity.GetUserId(User.Identity.Name);
            Bank bank = new Bank();

            HttpContext.Session["accountNumber"] = models.AccountNumber;

            if (ModelState.IsValid)
            {
                if (id == null)
                {
                  return View(bank.billUpdatePost(sessionUserID, models, null));
                }
                else
                {
                models.message = "Schedule Bill Had Been Updated";
                return View(bank.billUpdatePost(sessionUserID, models, id));
                }
            }
            else
            {
                return BillScheduleUpdate(id);
            }
        }