public function actionSuggestPostal()
 {
     if (Yii::app()->request->isAjaxRequest && (isset($_GET['term']) && isset($_GET['district']))) {
         $district = $_GET['district'];
         $area = $_GET['term'];
         $list_postcode = District::getListPostcode($area, $district);
         $this->setJsonHeader();
         echo CJSON::encode($list_postcode);
         Yii::app()->end();
     }
 }