public function UpdateBalance(Gyuser_Model_SupplierOperations $obj)
 {
     try {
         $table = $this->getDbTable();
         $set = array('balance' => $obj->getBalance());
         $where = array('id = ?' => $obj->getId());
         $result = $table->update($set, $where);
         return $result;
     } catch (Exception $e) {
         echo $e;
     }
 }