public function deleteAction()
 {
     $request = $this->getRequest();
     $form = new Application_Form_DeleteProduct();
     if ($this->getRequest()->isPost()) {
         if ($form->isValid($request->getPost())) {
             $data = $form->getValues();
             $productMapper = new Application_Model_ProductMapper();
             if (isset($data['product_id'])) {
                 $productMapper->delete($data['product_id']);
             }
             return $this->_helper->redirector('viewall');
         }
     }
 }