Округление числа с двумя запятыми

[wvxvw]

private static const _pattern:ByteArray = new ByteArray();
 
private static const _separator:int = 0x2E;
 
private static const _asciiZero:int = 0x30;
 
private static function format(digit:uint):String
{
	var reminder:uint;
 
	_pattern.clear();
	_pattern.length = 13;
	_pattern[0] = 12;
	while (_pattern[0])
	{
		reminder = digit;
		digit /= 10;
		reminder  -= digit * 10;
		if (((_pattern[0] + 1) & 2) == 2)
			_pattern[_pattern[0]--] = _separator;
		_pattern[_pattern[0]--] = _asciiZero + reminder;
	}
	_pattern[0] = _asciiZero + digit;
	return _pattern.toString();
}

Просто от нечего делать