protected function actionHtml($action)
    {
        $elements = $action->childNodes;

        if ($elements->length)
        {
            $html = '';
            for ($i = 0; $i < $elements->length; $i++)
            {
                $html .= $this->xml->saveXML($elements->item($i));
            }
            $this->html .= $html;
        }
    }