function navbar()
	{
		$header = '';
		if (!self::$header_done)
		{
			$header = $this->header();
		}
		$GLOBALS['egw_info']['flags']['nonavbar'] = false;

		if (!$this->sidebox_done && self::$header_done)
		{
			$this->do_sidebox();
			return $header.'<span id="late-sidebox" data-setSidebox="'.htmlspecialchars(json_encode(egw_framework::$extra['setSidebox'])).'"/>';
		}

		return $header;
	}