public function getpromotionAction()
 {
     $this->_helper->layout()->disableLayout();
     $this->_helper->viewRenderer->setNoRender();
     if ($this->getRequest()->isXmlHttpRequest()) {
         $promotion_id = $this->_getParam('promotion_id');
         $promotion = new PAP_Model_Promotion();
         $data = $promotion->getViewRecord($promotion_id);
         $this->_helper->json($data);
     }
 }