<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>纯js倒计时效果</title>
</head>
<body>
<div id="time">2017/6/17 18:15:00</div>
<script type="text/javascript">
var texts=document.getElementById('time').innerHTML;
function p(n){
return n<10?'0'+n:n;
}
function getMyTime(){
var startDate=new Date();
var endDate=new Date(texts);
var countDown=(endDate.getTime()-startDate.getTime())/1000;
var day=parseInt(countDown/(24*60*60));
var h=parseInt(countDown/(60*60)%24);
var m=parseInt(countDown/60%60);
var s=parseInt(countDown%60);
document.getElementById('time').innerHTML=p(day)+'天'+p(h)+'时'+p(m)+'分'+p(s)+'秒';
if(countDown<=0){
document.getElementById('time').innerHTML=00+'天'+00+'时'+00+'分'+00+'秒';
clearInterval(time);
};
}
time=setInterval(getMyTime,1000);
</script>
</body>
</html>
