jquery实现倒计时小应用

<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();
});