function getsizebytes($sz)
{
	if($sz < 1024) return ($sz . " bytes");
	if($sz < 1048576) return (number_format($sz/1024, 2)." Kb");
	if($sz < 1073741824) return (number_format($sz/1048576, 2)." Mb");

	return (number_format($sz/1073741824, 2)." Gb");
}