public function append($name, $content = null)
	{
		if (is_array($content)) {
			$first = $this->append($name, $content[0]);
			for ($i = 1; $i < count($content); $i++) {
				$this->append($name, $content[$i]);
			}
			return $first;
		}
		return $this->appendChild($this->newChild($name, $content));
	}