剩余时间倒计时

<SCRIPT language=JavaScript>
var auctionDate = 120;
var startTime = (new Date()).getTime();
var Temp;
var timerID = null;
var timerRunning = false;
function showtime()
{
now = new Date();
var ts=parseInt((startTime-now.getTime())/1000)+auctionDate;
var dateLeft = 0;
var hourLeft = 0;
var minuteLeft = 0;
var secondLeft = 0;
if(ts < 0)
{
ts = 0;
CurHour = 0;
CurMinute = 0;
CurSecond = 0;
} else {
dateLeft =parseInt(ts/86400);
ts = ts - dateLeft * 86400;
hourLeft = parseInt(ts/3600);
ts = ts - hourLeft * 3600;
minuteLeft = parseInt(ts/60);
secondLeft = ts - minuteLeft * 60;
}
if(hourLeft < 10) hourLeft = '0' +hourLeft;
if(minuteLeft < 10) minuteLeft = '0' +minuteLeft;
if(secondLeft<10) secondLeft='0'+secondLeft;
if( dateLeft > 0 )
dateLeft = dateLeft + "天" ;
else
dateLeft = "";
if( hourLeft > 0 )
hourLeft = hourLeft + "小时" ;
else
{
if( dateLeft != "" )
hourLeft = "00小时";
else
hourLeft = "";
}
if( minuteLeft > 0 )
minuteLeft = minuteLeft + "分钟" ;
else
{
if( dateLeft !="" || hourLeft != "")
minuteLeft = "00分钟";
else
minuteLeft = "";
}
if( secondLeft > 0 )
secondLeft = secondLeft + "秒" ;
else
{
if( dateLeft !="" || hourLeft != "" || minuteLeft != "")
secondLeft = "00秒";
else
secondLeft = "";
}
if (dateLeft == '') {
Temp=dateLeft+hourLeft+minuteLeft+secondLeft ;
}else {
Temp=dateLeft+hourLeft;
}
if(dateLeft <=0 && hourLeft<=0 && minuteLeft<=0 && secondLeft <=0)
{
Temp = "成交结束";
stopclock();
}
if (document.getElementById('time2')) document.getElementById('time2').innerHTML=Temp;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}
function stopclock()
{
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;
}
function macauclock()
{
stopclock();
showtime();
}
function onloadall()
{
macauclock();
try
{
initprovcity();
}
catch(e)
{
}
}
try
{
onload=onloadall();
}
catch(e)
{
}
</SCRIPT>
生成页面的时候把剩余的秒数写在<font id="time2">18595</font>里面,js初始化设置下变量auctionDate就可以了。