简单的倒计时js
'''
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>倒计时</title>
<style type="text/css">
.box{
width: 660px;
height: 300px;
background: #181818 url() 0 0 no-repeat;
margin: 0 auto;
}
p.top{
width: 660px;
height: 80px;
border-bottom: 2px solid #A3FE47;
margin: 0 auto;
}
p.i{
line-height: 80px;
font-style: normal;
font-size:45px;
color: #FFFFFF;
padding-left: 180px;
}
p.ii{
line-height: 100px;
font-style: normal;
font-size:30px;
color: #FFFFFF;
}
p.box1{
width: 100px;
height: 100px;
background: #7F7F7F url() 0 0 no-repeat;
float: left;
margin-left:50px;
}
p.bottom{
width: 550px;
height: 50px;
background: #7F7F7F url() 0 0 no-repeat;
float: left;
margin-left:50px;
}
</style>
</head>
<body>
<script type="text/javascript">
window.onload= function(){
var now=new Date();
var atime=now.getTime();
var yd=new Date('2018/01/01 00:00:00');
var btime=yd.getTime();
atime=parseInt(atime);
btime=parseInt(btime);
timec=(btime-atime);
// 秒 分 时 天
days=Math.floor(timec/1000/60/60/24);//剩余天数
hours=Math.floor(timec/1000/60/60-(days*24));
minutes=Math.floor(timec/1000/60-(days*24*60)-hours*60);
seconds=Math.floor(timec/1000-(days*24*60*60)-hours*60*60-minutes*60);
document.getElementById('day').innerHTML=(days+" 天");
document.getElementById('hour').innerHTML=(hours+" 时");
document.getElementById('minute').innerHTML=(minutes+" 分");
document.getElementById('sec').innerHTML=(seconds+" 秒");
}
</script>
<div class="box">
<p class="top i" id="top">距离高考还有:</p>
<p class="box1 ii" id="day"></p>
<p class="box1 ii" id="hour"></p>
<p class="box1 ii" id="minute"></p>
<p class="box1 ii" id="sec"></p>
<p class="bottom" id="bottom"></p>
</div>
</body>
</html>
