public static function &getInstance()
 {
     if (self::$_instance === null) {
         self::$_instance = new self();
     }
     return self::$_instance;
 }
 public function getDataByBiggerThanIdAndDateIndex($id, $dateIndex, $status, $orderby, $sort, $offSet, $pageSize, $type)
 {
     if ($type == Const_ShowcaseOrders::SALE_DB) {
         $info = Model_Broker_AdArrearageSale::getInstance()->getDataByBiggerThanIdAndDateIndex($id, $dateIndex, $status, $orderby, $sort, $offSet, $pageSize);
         return $info;
     } elseif ($type == Const_ShowcaseOrders::RENT_DB) {
         $info = Model_Broker_AdArrearageRent::getInstance()->getDataByBiggerThanIdAndDateIndex($id, $dateIndex, $status, $orderby, $sort, $offSet, $pageSize);
         return $info;
     } else {
         return array();
     }
 }