计时器功能代码：
<html>
<body>
<script type="text/javascript">
//设置起始时间
var together = new Date();
together.setFullYear(2015,9,17); //时间年月日 注意这个9代表的是10月
together.setHours(0);//小时
together.setMinutes(00);//分钟
together.setSeconds(0); //秒前一位
together.setMilliseconds(2);//秒第二位
//使用定时器调用这个函数 就可实现
timeElapse(together);
function timeElapse(date){
var current = Date();
var seconds = (Date.parse(current) - Date.parse(date)) / 1000;
var days = Math.floor(seconds / (3600 * 24));
seconds = seconds % (3600 * 24);
var hours = Math.floor(seconds / 3600);
if (hours < 10) {
hours = "0" + hours;
}
seconds = seconds % 3600;
var minutes = Math.floor(seconds / 60);
if (minutes < 10) {
minutes = "0" + minutes;
}
seconds = seconds % 60;
if (seconds < 10) {
seconds = "0" + seconds;
}
var result = "第 <span class=\"digit\">" + days + "</span> 天 <span class=\"digit\">" + hours + "</span> 小时 <span class=\"digit\">" + minutes + "</span> 分钟 <span class=\"digit\">" + seconds + "</span> 秒";
document.write(result)
}
</script>
</body>
</html>
定时器在哪调用自行添加。
