<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>简单易用的倒计时js代码</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 now = new Date(2016,9,1,0,0,0);
var year=now.getFullYear();
var month=now.getMonth();
var urodz = new Date(parseInt(year),6,1,0,0,0);
if(parseInt(month)>6)
urodz=new Date(parseInt(year)+1,6,1,0,0,0);
var NowTime = new Date();
var year=NowTime.getFullYear(); //获取完整的年份(4位,1970-????)
var month=NowTime.getMonth(); //获取当前月份(0-11,0代表1月)
var EndTime= new Date(parseInt(year),6,1,0,0,0);
// if(parseInt(month>6) EndTime=new Date(parseInt(year)+1,6,1,0,0,0);}
var t =EndTime.getTime() - NowTime.getTime();
var d=0;
var h=0;
var m=0;
var s=0;
if(t>=0){
d=Math.floor(t/1000/60/60/24);
h=Math.floor(t/1000/60/60%24);
m=Math.floor(t/1000/60%60);
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>
</body>
</html>
这种方法 有一定问题
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>实现时间倒计时的JS代码</title>
<style type="text/css">
</style>
</head>
<body>
<div>
<script language=JavaScript>
function GetServerTime()
{
//var now = new Date(2016,5,1,0,0,0);// 给个上半年时间测试
var now = new Date();
var year=now.getFullYear();
var urodz = new Date(parseInt(year),6,1,0,0,0);
var month=now.getMonth();
if(parseInt(month)>=6)
urodz=new Date(parseInt(year)+1,6,1,0,0,0);
days = (urodz - now) / 1000 / 60 / 60 / 24;
daysRound = Math.floor(days);
hours = (urodz - now) / 1000 / 60 / 60 - (24 * daysRound);
hoursRound = Math.floor(hours);
minutes = (urodz - now) / 1000 /60 - (24 * 60 * daysRound) - (60 * hoursRound);
minutesRound = Math.floor(minutes);
seconds = (urodz - now) / 1000 - (24 * 60 * 60 * daysRound) - (60 * 60 * hoursRound) - (60 * minutesRound);
secondsRound = Math.round(seconds);
document.getElementById("date").innerHTML = daysRound;
document.getElementById("time").innerHTML = hoursRound + ":" + minutesRound + ":" + secondsRound;//+wznow；//
}
setInterval("GetServerTime()",250);
</script>
<span>距离毕业还有</span>
<span id="date"></span>
<span class="white14b">天</span>
<span id="time"></span>
</div>
</body>
</html>
时间是7月1日毕业 ，然后呢，表达时间为2017，6,1
测试 猎豹 IE均通过
效果理想原文：http://wzsts.blog.51cto.com/10251779/1794823