JS倒計時——天時分秒

HTML代碼：
<div id="times_wrap" class="time_num">
    距離結束時間：
    <div class="time_w">
        <b id="times_d" class="time"> </b>天
        <b id="times_h" class="time"> </b>時
        <b id="times_m" class="time"> </b>分
        <b id="times_s" class="time"> </b>秒
    </div>
</div>

JavaScript代碼： <script type="text/javascript"> setTimeout("show_time()",1000); var time_wrap = document.getElementByIdx_x("times_wrap"); var time_d = document.getElementByIdx_x("times_d"); var time_h = document.getElementByIdx_x("times_h"); var time_m = document.getElementByIdx_x("times_m"); var time_s = document.getElementByIdx_x("times_s"); var time_end = new Date("2012/10/29 08:00:00");  // 設定結束時間 time_end = time_end.getTime(); function show_time(){     var time_now = new Date();  // 獲取當前時間         time_now = time_now.getTime();     var time_distance = time_end - time_now;  // 結束時間減去當前時間     var int_day, int_hour, int_minute, int_second;     if(time_distance >= 0){         // 天時分秒換算         int_day = Math.floor(time_distance/86400000)         time_distance -= int_day * 86400000;         int_hour = Math.floor(time_distance/3600000)         time_distance -= int_hour * 3600000;         int_minute = Math.floor(time_distance/60000)         time_distance -= int_minute * 60000;         int_second = Math.floor(time_distance/1000)           // 時分秒爲單數時、前面加零站位         if(int_hour < 10)         int_hour = "0" + int_hour;         if(int_minute < 10)         int_minute = "0" + int_minute;         if(int_second < 10)         int_second = "0" + int_second;                  // 顯示時間         time_d.innerHTML = int_day;         time_h.innerHTML = int_hour;         time_m.innerHTML = int_minute;         time_s.innerHTML = int_second;                  setTimeout("show_time()",1000);     }else{         time_d.innerHTML = time_d.innerHTML;         time_h.innerHTML = time_h.innerHTML;         time_m.innerHTML = time_m.innerHTML;         time_s.innerHTML = time_s.innerHTML;           // clearTimeout(timerID)     } }; </script>