public function sortproductsAction()
 {
     if ($rows = $this->getRequest()->getParam('product')) {
         $html = array();
         try {
             if (!$this->getCurrentOptionValue()) {
                 throw new Exception('Une erreur est survenue lors de la sauvegarde.');
             }
             $product = new Catalog_Model_Product();
             $products = $product->findByValueId($this->getCurrentOptionValue()->getId());
             $product_ids = array();
             foreach ($products as $product) {
                 $product_ids[] = $product->getId();
             }
             foreach ($rows as $key => $row) {
                 if (!in_array($row, $product_ids)) {
                     throw new Exception($this->_('An error occurred while saving. One of your products could not be identified.'));
                 }
             }
             $product->updatePosition($rows);
             $html = array('success' => 1);
         } catch (Exception $e) {
             $html = array('message' => $e->getMessage());
         }
         $this->getLayout()->setHtml(Zend_Json::encode($html));
     }
 }