/**
  * 培训机构类型删除AJAX方法
  * @param   string      $tit_id_str 形如1,3,4样式的ID列表
  */
 public function removeTITFunc($tit_id_str)
 {
     $resp = new AjaxResponse();
     if (!$this->check_power_new('traininginstitution_removetit', false)) {
         $resp->alert('您没有权限执行该功能');
         return $resp;
     }
     try {
         TrainingInstitutionModel::removeTrainingInstitutionType($tit_id_str);
         admin_log('delete', '', "培训机构类型tit_id: {$tit_id_str}");
         $resp->call('location.reload');
     } catch (Exception $e) {
         $resp->alert($e->getMessage());
     }
     return $resp;
 }