public ActionResult AddNew(string dept_name, string dir_name, string dir_ID,
                                   int room_ID, int people_num)
        {
            DepartmentService d = new DepartmentService();

            d.AddNewDepartment(dept_name, dir_name, dir_ID, room_ID, people_num);
            return(Json("true", JsonRequestBehavior.AllowGet));
        }