public UserStatus GetUserValidity(UserDetails u)
 {
     if (u.UserName == "Admin" && u.Password == "Admin")
     {
         return UserStatus.AuthenticatedAdmin;
     }
     else if (u.UserName == "Gorm" && u.Password == "Kjeldsen")
     {
         return UserStatus.AuthenticatedUser;
     }
     else
     {
         return UserStatus.NonAuthenticatedUser;
     }
 }
        public ActionResult DoLogin(UserDetails u)
        {
            if (ModelState.IsValid)
            {
                EmployeeBusinessLayer empBL = new EmployeeBusinessLayer();
                UserStatus status = empBL.GetUserValidity(u);
                bool IsAdmin = status == UserStatus.AuthenticatedAdmin;

                if (status == UserStatus.NonAuthenticatedUser)
                {
                    ModelState.AddModelError("CredentialError", "Invalid Username or Password.");
                    return View("Login");
                }

                    FormsAuthentication.SetAuthCookie(u.UserName, false);
                    Session["IsAdmin"] = IsAdmin;
                    return RedirectToAction("Index", "Employee");
            }
            else
            {
                return View("Login");
            }
        }