function toLocalTime(serverNow, serverTargetTime, format)
{
	var now = new Date();
	var targetTime = serverTargetTime;
	var gap = serverNow.valueOf() - now.valueOf();
	if (gap>1200000 || gap< -1200000)
	{
		targetTime = new Date(serverTargetTime .valueOf()-gap);
	}
	return targetTime.format(format);
}