public function addtoStock() {
        if ($this->request->isAjax ()) {
            $form = $this->addToStockForm ();

            $content = $this->renderWith ( 'ProdForm', array (
                'Form' => $form
            ) );
            echo "<pre>";
                print_r($content);
            echo "</pre>";
            return json_encode ( array (
                'title' => _t ( 'Product.ADDPRODUCT', 'Produkt hinzufügen' ),
                'content' => $content
            ) );
        }
    }