<span class="joind">135</span>天<span class="joinh">7</span>时<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;

 //差值计算

 //例子(模拟)

 chazhi = 135 * 86400000;

 //真实时间(注意月份需减掉1，否则时间会计算错误)

 //chazhi = (new Date(year,month-1,day,hour,minute,second)) - (new Date()); //计算剩余的毫秒数

 //chazhi = (new Date(2018,8-1,6,6,6,6)) - (new Date());

  

 //执行函数部分

 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); //计算剩余的天数

  var hours = parseInt(leftTime / 1000 / 60 / 60 % 24, 10); //计算剩余的小时

  var minutes = parseInt(leftTime / 1000 / 60 % 60, 10); //计算剩余的分钟

  var seconds = parseInt(leftTime / 1000 % 60, 10); //计算剩余的秒数

  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) { //将0-9的数字前面加上0，例1变为01

 if(i < 10) {

  i = "0" + i;

 }

 return i;

 }

</script>