jquery制做精致的倒计时特效

<div id="shop_rec">
 <ul class="cf">
  <li>
   <img src="image/goods.jpg" alt="小米 Note 顶配版" />
   <div>
    <h5>小米 Note 顶配版</h5>
    <p>全网通 香槟金 移动联通<br />双4G手机 双卡双待</p>
    <em>¥2998<i>起</i></em>
    <span class="time" data-starttime="1445982375" data-endtime="1446350400"></span>
   </div>
  </li>
  <li>
   <img src="image/goods.jpg" alt="小米 Note 顶配版" />
   <div>
    <h5>小米 Note 顶配版</h5>
    <p>全网通 香槟金 移动联通<br />双4G手机 双卡双待</p>
    <em>¥2998<i>起</i></em>
    <span class="time" data-starttime="1445912375" data-endtime="1436350400"></span>
   </div>
  </li>
 </ul>
</div>

$(function(){
 var abj = $("#shop_rec"),
  timeObj = abj.find('.time');
 var starttime = timeObj.data('starttime');

 // 定时器函数
 function actionDo(){
  return setInterval(function(){
   timeObj.each(function(index, el) {
    var t = $(this),
     surplusTime = t.data('endtime') -starttime;
    if (surplusTime <= 0) {
     t.html("活动已经开始");
    } else{
     var year = surplusTime/(24*60*60*365),
      showYear = parseInt(year),
      month = (year-showYear)*12,
      showMonth = parseInt(month),
      day = (month-showMonth)*30,
      showDay = parseInt(day),
      hour = (day-showDay)*24,
      showHour = parseInt(hour),
      minute = (hour-showHour)*60,
      showMinute = parseInt(minute),
      seconds = (minute-showMinute)*60,
      showSeconds = parseInt(seconds);
     t.html("");
     if (showYear>0) {
      t.append("<span>"+showYear+"年</span>")
     };
     if (showMonth>0) {
      t.append("<span>"+showMonth+"月</span>")
     };
     if (showDay>0) {
      t.append("<span>"+showDay+"天</span>")
     };
     if (showHour>=0) {
      t.append("<span>"+showHour+"小时</span>")
     };
     if (showMinute>=0) {
      t.append("<span>"+showMinute+"分钟</span>")
     };
     if (showSeconds>=0) {
      t.append("<span>"+showSeconds+"秒</span>")
     };
    };
   });
   starttime++;
  },1000); // 设定执行或延时时间
 };
 // 执行它
 actionDo();
});