protected function _url() {
		if (isset($this->_config['url'])) {
			return rtrim($this->_config['url'], '/');
		}
		if (!empty($_GET['url']) ) {
			return rtrim($_GET['url'], '/');
		}
		if ($uri = $this->env('REQUEST_URI')) {
			return str_replace($this->env('base'), '/', parse_url($uri, PHP_URL_PATH));
		}
		return '/';
	}