JS实现的网页倒计时数字时钟效果

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我是靠谱客的博主彩色日记本，最近开发中收集的这篇文章主要介绍JS实现的网页倒计时数字时钟效果，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

本文实例讲述了JS实现的网页倒计时数字时钟效果。分享给大家供大家参考。具体实现方法如下：

复制代码代码如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>javascript实现的倒计时时钟</title>

<style>

body,div{margin:0;padding:0;}

body{color:#fff;font:16px/1.5 5fae8f6f96c59ed1;}

#countdown{width:300px;text-align:center;background:#1a1a1a;margin:10px auto;padding:20px 0;}

input{border:0;width:283px;height:50px;cursor:pointer;margin-top:20px;background:url(http://www.uoften.com/jscss/demoimg/201210/btn-1.png) no-repeat;}

input.cancel{background-position:0 -50px;}

span{color:#000;width:80px;line-height:2;background:#fbfbfb;border:2px solid #b4b4b4;margin:0 10px;padding:0 10px;}

</style>

<script>

window.onload = function ()

{

var oCountDown = document.getElementById("countdown");

var aInput = oCountDown.getElementsByTagName("input")[0];

var timer = null;

aInput.onclick = function ()

{

this.className == "" ? (timer = setInterval(updateTime, 1000), updateTime()) : (clearInterval(timer));

this.className = this.className == '' ? "cancel" : '';

};

function format(a)

{

return a.toString().replace(/^(d)$/,'0$1')

}

function updateTime ()

{

var aSpan = oCountDown.getElementsByTagName("span");

var oRemain = aSpan[0].innerHTML.replace(/^0/,'') * 60 + parseInt(aSpan[1].innerHTML.replace(/^0/,''));

if(oRemain <= 0)

{

clearInterval(timer);

return

}

oRemain--;

aSpan[0].innerHTML = format(parseInt(oRemain / 60));

oRemain %= 60;

aSpan[1].innerHTML = format(parseInt(oRemain));

}

}

</script>

</head>

<body>

<div id="countdown">

<span>01</span>分钟<span>40</span>秒

<input type="button" value="" />

</div>脚本之家 www.uoften.com 代码特效

</body>

</html>