public function assignData($data)
 {
     if (!$data instanceof Varien_Object) {
         $data = new Varien_Object($data);
     }
     Mage::getSingleton('core/session')->setLsAccountNumber($data->getLsAccountNumber())->setLsBankCode($data->getLsBankCode())->setLsHolder($data->getLsHolder());
     return $this;
 }