public function getJavascriptValue()
    {
        $args = array();
        foreach ($this as $child) {
            if ($child instanceof HTML_QuickForm2_Container) {
                $args[] = $child->getJavascriptValue();
            } else {
                $args[] = "'" . $child->getId() . "'";
            }
        }
        return 'qf.form.getContainerValue(' . implode(', ', $args) . ')';
    }