public function postTambahJra(Request $request)
 {
     $validator = \Validator::make($request->all(), ['kode' => 'required|unique:jra_dokumens']);
     if ($validator->fails()) {
         \Session::flash('alert-warning', 'Periksa kembali input');
         return redirect()->back()->withInput();
     }
     $data = $request->all();
     $data['level'] = '0';
     $jra = Jra_dokumen::create($data);
     return isset($data['prev_url']) ? redirect($data['prev_url']) : redirect()->back();
 }