public ActionResult NotificationContent()
 {
     int noti_id = int.Parse(Request.QueryString.Get("NOID"));
     Notice notice= new Notice();
     List<int> id_list = new List<int>();
     NoticeHandle handler = new NoticeHandle();
     id_list = handler.getNoticeIdSet();
     notice = handler.getNoticeByID(noti_id);
     ViewData["Current_Notice_id"] = noti_id;
     ViewData["notice"] = notice;
     ViewData["notice_id_list"] = id_list;
     int index = id_list.IndexOf(noti_id);
     return View();
 }