我们这里只要自己定义一下s与urodz的值就可以随意定义任何日期或节日的倒计时功能了，各位朋友可加以修改。

精确到天的倒计时

复制代码 代码如下:

<script language="JavaScript">

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精确到秒的javascript倒计时代码

HTML代码:

复制代码 代码如下:

<form name="form1">

<div align="center" align="center">

<center>离2010年还有:<br>

<input type="textarea" name="left" size="35">

</center>

</div>

</form>

<script LANGUAGE="javascript">

startclock()

var timerID = null;

var timerRunning = false;

function showtime() {

Today = new Date();

var NowHour = Today.getHours();

var NowMinute = Today.getMinutes();

var NowMonth = Today.getMonth();

var NowDate = Today.getDate();

var NowYear = Today.getYear();

var NowSecond = Today.getSeconds();

if (NowYear <2000)

NowYear=1900+NowYear;

Today = null;

Hourleft = 23 - NowHour

Minuteleft = 59 - NowMinute

Secondleft = 59 - NowSecond

Yearleft = 2009 - NowYear

Monthleft = 12 - NowMonth - 1

Dateleft = 31 - NowDate

if (Secondleft<0)

{

Secondleft=60+Secondleft;

Minuteleft=Minuteleft-1;

}

if (Minuteleft<0)

{

Minuteleft=60+Minuteleft;

Hourleft=Hourleft-1;

}

if (Hourleft<0)

{

Hourleft=24+Hourleft;

Dateleft=Dateleft-1;

}

if (Dateleft<0)

{

Dateleft=31+Dateleft;

Monthleft=Monthleft-1;

}

if (Monthleft<0)

{

Monthleft=12+Monthleft;

Yearleft=Yearleft-1;

}

Temp=Yearleft+'年, '+Monthleft+'月, '+Dateleft+'天, '+Hourleft+'小时, '+Minuteleft+'分, '+Secondleft+'秒'

document.form1.left.value=Temp;

timerID = setTimeout("showtime()",1000);

timerRunning = true;

}

var timerID = null;

var timerRunning = false;

function stopclock () {

if(timerRunning)

clearTimeout(timerID);

timerRunning = false;

}

function startclock () {

stopclock();

showtime();

}

// -->

</script>