考试倒计时
<!DOCTYPE html>
<head>
<meta charset="UTF-8">
<title>考试倒计时</title>
<style>
#time{
height: 100px;
background:url(img/jz3.gif) no-repeat;
padding: 20px 126px;
color: #0000FF;
font-size: 28px;
}
</style>
</head>
<body>
<div id="time"></div>
<script>
var time=document.getElementById('time');
var ks=new Date();var msks = ks.getTime();
var js=msks+3*60*1000;
function jsover()
{
var syfz=Math.floor((js-new Date().getTime())/(1000*60));
var sym=Math.floor((js-new Date().getTime()-syfz*1000*60)/(1000));
if(syfz<2) time.style.background="url(img/jz1.gif)no-repeat";
if(syfz<1) time.style.background="url(img/jz2.gif)no-repeat";
if(syfz<0)
{
time.innerHTML="";
time.style.background="";
clearInterval(timeID);
}
else
time.innerHTML="高考结束还剩"+syfz+"分"+sym+"秒";
}
timeID=setInterval("jsover()",1000);
</script>
</body>
</html>