急急急急！！！！！倒计时器制作问题，计时器怎么设计倒计时

onEnterFrame = function () {

EndTime = new Date(2010, 0, 14);

NowTime = new Date();

Time = int((EndTime.getTime()-NowTime.getTime())/1000);

aa.text = Time;//剩余总秒数

if (Time>=0) {

day = int(Time/(60*60*24));

hours = int((Time-day*60*60*24)/3600);

min = int((Time-day*60*60*24-hours*60*60)/60);

sec = int(Time-day*60*60*24-hours*60*60-min*60);

day_txt.text = day;

dh_txt.text = hours;

min_txt.text = min;

sec_txt.text = sec;

}

};