简单倒计时

 原理:定的时间 -现在时间=时间差  

讲时间差转换成时 分 秒   显示出来

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>简单易用的倒计时js代码 - 网站源码</title>
<style>
*{ margin:0; padding:0; list-style:none;}
body{ font-size:18px; text-align:center;}
.time{ height:30px; padding:200px;}
</style>
</head>
<body>
    <div class="time">
        <span id="t_d">00天</span>
        <span id="t_h">00时</span>
        <span id="t_m">00分</span>
        <span id="t_s">00秒</span>
    </div>
<script>
   function GetRTime(){
       var EndTime= new Date('2019/06/20 00:00:00');
       var NowTime = new Date();
       var t =EndTime.getTime() - NowTime.getTime();
       
    var d=Math.floor(t/1000/60/60/24);
       var h=Math.floor(t/1000/60/60%24);
       var m=Math.floor(t/1000/60%60);
       var s=Math.floor(t/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";
   }
   setInterval(GetRTime,0);
</script>

<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">
</div>

</body>
</html> 

  

每秒刷新一下

posted @ 2016-03-23 16:44  考虑突破  阅读(299)  评论(0编辑  收藏  举报