public function validate($field)
 {
     switch ($field) {
         case 'coll':
             $row = CollCred::find(Input::get('id'));
             break;
         case 'fs':
             $row = FsCred::find(Input::get('id'));
             break;
         case 'botb':
             $row = BotbCred::find(Input::get('id'));
             break;
         default:
             $row = CollCred::find(Input::get('id'));
             break;
     }
     if (!$row) {
         return Redirect::to('reg')->with('err', [$field, 'id']);
     }
     if (strcmp($row->passwd, md5(Input::get('passwd')))) {
         return Redirect::to('reg')->with('err', [$field, 'passwd']);
     }
     Session::put('sense', [$field, $row->id]);
     return Redirect::to('member/' . $field);
 }
 public function validate()
 {
     $row = CollCred::find(Input::get('id'));
     if (!$row) {
         return Redirect::to('reg')->with('type', 'id')->with('err', 'Invalid college id');
     }
     if (strcmp($row->passwd, md5(Input::get('passwd')))) {
         return Redirect::to('reg')->with('type', 'passwd')->with('err', 'Invalid college id / password combination');
     }
     Session::put('collId', $row->id);
     return Redirect::to('member');
 }