<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>countDown</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
</head>
<body>
<span></span>
<span>天</span>
<span></span>
<span>小时</span>
<span></span>
<span>分钟</span>
<span></span>
<span>秒</span>
<span></span>
<span>毫秒</span>
</body>
<script type="text/javascript">
var spans = document.getElementsByTagName('span');
var endDate = new Date('2015/06/01,00:00:00');
var timer = setInterval(function(){
var nowDate = new Date();
var a = endDate.getTime()-nowDate.getTime();
spans[0].innerHTML = Math.floor(a/24/60/60/1000);
spans[2].innerHTML = Math.floor(a/60/60/1000%24);
spans[4].innerHTML = Math.floor(a/60/1000%60);
spans[6].innerHTML = Math.floor(a/1000%60);
spans[8].innerHTML = Math.floor(a%1000);
},1)
</script>
</html>