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：

代码如下:

javascript实现的倒计时时钟

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

body{color:#fff;font:16px/1.5 \5fae\8f6f\96c5\9ed1;}

#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(//www.gxlcms.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;}

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));

}

}

脚本之家 www.gxlcms.com 代码特效

希望本文所述对大家的javascript程序设计有所帮助。

本条技术文章来源于互联网，如果无意侵犯您的权益请点击此处反馈版权投诉

本文系统来源：php中文网