Javascript倒计时 TC

JS脚本是在网上找到的，然后进行了改进，弥补了不足之处。

JS脚本：

 1   <script language="javascript" type="text/javascript">
 2         var interval = 1000;
 3         function ShowCountDown(year, month, day, divname) {
 4             var now = new Date();
 5             var endDate = new Date(year, month - 1, day, 14, 07);
 6             var leftTime = endDate.getTime() - now.getTime();
 7             var leftsecond = parseInt(leftTime / 1000);
 8             var day1 = Math.floor(leftsecond / (60 * 60 * 24));
 9             var hour1 = Math.floor((leftsecond - day1 * 24 * 60 * 60) / 3600);
10             var hour = Math.floor((leftsecond - 60 * 60) / 3600);
11             //如果小时为负数 显示0
12             if (hour > 0) {
13             }
14             else {
15                 hour = 0;
16             }
17             if (day1 < 0) {
18                 hour = hour1
19             }
20             var minute = Math.floor((leftsecond - day1 * 24 * 60 * 60 - hour1 * 3600) / 60);
21             var second = Math.floor(leftsecond - day1 * 24 * 60 * 60 - hour1 * 3600 - minute * 60);
22             var cc = document.getElementById(divname);
23             //如果结束时间为负数 就显示0
24             if (leftTime > 0) {
25                 cc.innerHTML = hour + "小时" + minute + "分" + second + "秒";
26                 //如果显示年份 取消注释
27                 //cc.innerHTML = "距离" + year + "年" + month + "月" + day + "日还有：" + hour + "小时" + minute + "分" + second + "秒";
28             }
29             else {
30                 cc.innerHTML = 0 + "小时" + 0 + "分" + 0 + "秒";
31             }
32         }
33         //showData是DIV的ID 2010，8，10表示是年月日的意思 参数根据自己的需求设置。
34         window.setInterval(function () { ShowCountDown(2010, 8, 10, 'showData'); }, interval); 
35     </script>

 HTML：

   <div id="showData">
2   </div>