CArray2XML::StartElement

private function StartElement($key, $value='')
	{
		if ($st = mb_strpos($key, '>>'))
		{
			$data = ' '.mb_substr($key, $st + 2);
			$key = mb_substr($key, 0, $st);
		}
		else $data = '';
		array_push($this->elementStack, $key);
		$cnt = count($this->elementStack)-1;
		$this->xml .= "n".str_repeat("t", $cnt).'<'.$key.$data.'>';
		$this->xml .= $value;
	}