function &addText($text, &$offset = null) {
	#php5e
		return $this->addChild(new $this->childClass_Text($this, $text), $offset);
	}
function &addText($text, &$offset = null) {
	#php5e
		return $this->addChild(new $this->childClass_Text($this, $text), $offset);
	}
#php5