';
		$level_0 = get_help_content('sitetoc');
		if(! $level_0) {
			$path = 'toc';
			$x = determine_help_language();
			$lang = $x['language'];
			if($lang !== 'en') {
				$path = $lang . '/toc';
			}
			$level_0 = get_help_content($path);
		}
		$level_0 = preg_replace('/\
/','',$level_0);
		$levels = array();
		// TODO: Implement support for translations in hierarchical table of content files
		/*
		if(argc() > 2) {
			$path = '';
			for($x = 1; $x < argc(); $x ++) {
				$path .= argv($x) . '/';
				$y = get_help_content($path . 'sitetoc');
				if(! $y)
					$y = get_help_content($path . 'toc');
				if($y)
					$levels[] = preg_replace('/\/','',$y);
			}
		}
		*/
		if($level_0)
			$o .= $level_0;
		if($levels) {
			foreach($levels as $l) {
				$o .= '
';
				$o .= $l;
			}
		}
		$o .= '';
		return $o;
	}
}