1 function getRTime(){
2 var EndTime= new Date('2015/01/13 10:00:00'); //截止时间
3 var NowTime = new Date();
4 var t =EndTime.getTime() - NowTime.getTime();
5
6 var d=Math.floor(t/1000/60/60/24);
7 var h=Math.floor(t/1000/60/60%24);
8 var m=Math.floor(t/1000/60%60);
9 var s=Math.floor(t/1000%60);
10
11 document.getElementById("t_d").innerHTML = d + "天";
12 document.getElementById("t_h").innerHTML = h + "时";
13 document.getElementById("t_m").innerHTML = m + "分";
14 document.getElementById("t_s").innerHTML = s + "秒";
15 }
16 setInterval(getRTime,1000);
<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>
