public function html($path=null, $pos=0) {
		if($this->xpath === null)
			return null;
		if(!$path)
			return trim(static::getInnerHTML($this->domnode));
		else {
			$item = $this->item($path, $pos);
			if($item === null)
				return null;
			return $item->html();
		}
	}