<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js实现倒计时</title>
</head>
<body>
<div>
<span id="t_d"></span>
<span id="t_h"></span>
<span id="t_m"></span>
<span id="t_s"></span>
</div>
<script type="text/javascript">
function display(year,month,day,hour,minute,second){
var endTime=new Date(year,month-1,day,hour,minute,second);
var nowTime=new Date();
var time=endTime.getTime()-nowTime.getTime();
var d=0;
var h=0;
var m=0;
var s=0;
if(time>=0){
d=Math.floor(time/1000/60/60/24);
h=Math.floor(time/1000/60/60%24);
m=Math.floor(time/1000/60%60);
s=Math.floor(time/1000%60);
document.getElementById("t_d").innerHTML=d+"天";
document.getElementById("t_h").innerHTML=h+"时";
document.getElementById("t_m").innerHTML=m+"分";
document.getElementById("t_s").innerHTML=s+"秒";
--s;
}
}
setInterval("display(2017,9,1,15,10,00)",1000);
</script>
</body>
</html>
