protected function _output($html)
    {
        $html = "<div id='ZFDebug_offset'></div>\n<div id='ZFDebug'>\n$html\n</div>\n</body>";
        $response = $this->getResponse();
        // $response->setBody(preg_replace('/(<\/head>)/i', $this->_headerOutput() . '$1', $response->getBody()));
        $response->setBody(str_ireplace('</body>', $this->_headerOutput() . $html, $response->getBody()));
    }