<span class="joind">135</span>天<span class="joinh">7</span>時<span class="joinm">46</span>分<span class="joins">25</span>秒 

<script src="https://code.jquery.com/jquery-3.1.1.min.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
 var setTimer = null;
 var chazhi = 0;
 //差值計算
 //例子(模擬)
 chazhi = 135 * 86400000;
 //真實時間(注意月份需減掉1，否則時間會計算錯誤)
 //chazhi = (new Date(year,month-1,day,hour,minute,second)) - (new Date()); //計算剩余的毫秒數(shù)
 //chazhi = (new Date(2018,8-1,6,6,6,6)) - (new Date());
 
 //執(zhí)行函數(shù)部分
 countFunc(chazhi);
 setTimer = setInterval(function() {
 chazhi = chazhi - 1000;
 countFunc(chazhi);
 }, 1000);
 function countFunc(leftTime) {
 if(leftTime >= 0) {
  var days = parseInt(leftTime / 1000 / 60 / 60 / 24, 10); //計算剩余的天數(shù) 
  var hours = parseInt(leftTime / 1000 / 60 / 60 % 24, 10); //計算剩余的小時 
  var minutes = parseInt(leftTime / 1000 / 60 % 60, 10); //計算剩余的分鐘 
  var seconds = parseInt(leftTime / 1000 % 60, 10); //計算剩余的秒數(shù) 
  days = checkTime(days);
  hours = checkTime(hours);
  minutes = checkTime(minutes);
  seconds = checkTime(seconds);
  $(".joind").html(days);
  $(".joinh").html(hours);
  $(".joinm").html(minutes);
  $(".joins").html(seconds);
 } else {
  clearInterval(setTimer);
  $(".joind").html("00");
  $(".joinh").html("00");
  $(".joinm").html("00");
  $(".joins").html("00");
 }
 }
 function checkTime(i) { //將0-9的數(shù)字前面加上0，例1變?yōu)?1 
 if(i < 10) {
  i = "0" + i;
 }
 return i;
 }
</script>