Javascript倒计时代码

<script language="javascript" type="text/javascript"> 
var interval = 1000; 
function ShowCountDown(year, month, day, divname) { 
var now = new Date(); 
var endDate = new Date(year, month - 1, day, 14, 07); 
var leftTime = endDate.getTime() - now.getTime(); 
var leftsecond = parseInt(leftTime / 1000); 
var day1 = Math.floor(leftsecond / (60 * 60 * 24)); 
var hour1 = Math.floor((leftsecond - day1 * 24 * 60 * 60) / 3600); 
var hour = Math.floor((leftsecond - 60 * 60) / 3600); 
//如果小时为负数 显示0 
if (hour > 0) { 
} 
else { 
hour = 0; 
} 
if (day1 < 0) { 
hour = hour1 
} 
var minute = Math.floor((leftsecond - day1 * 24 * 60 * 60 - hour1 * 3600) / 60); 
var second = Math.floor(leftsecond - day1 * 24 * 60 * 60 - hour1 * 3600 - minute * 60); 
var cc = document.getElementById(divname); 
//如果结束时间为负数 就显示0 
if (leftTime > 0) { 
cc.innerHTML = hour + "小时" + minute + "分" + second + "秒"; 
//如果显示年份 取消注释 
//cc.innerHTML = "距离" + year + "年" + month + "月" + day + "日还有：" + hour + "小时" + minute + "分" + second + "秒"; 
} 
else { 
cc.innerHTML = 0 + "小时" + 0 + "分" + 0 + "秒"; 
} 
} 
//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。 
window.setInterval(function () { ShowCountDown(2010, 8, 10, 'showData'); }, interval); 
</script>

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