public ActionResult ViewBySupplier(string supID)
        {
            PhoneDAO    dao    = new PhoneDAO();
            SupplierDAO daoSup = new SupplierDAO();

            Session["MANAGE"]    = "Shop";
            ViewData["SUPPLIER"] = daoSup.GetSupplier(supID);
            ViewData["PHONE"]    = dao.GetAllCurrentPhoneBySup(supID);
            return(View("Index"));
        }