js setInterva倒计时
<html><body>
<p>
<span id="h"></span>时
<span id="m"></span>分
<span id="s"></span>秒</p>
测试<p id="test"></p>
<script type="text/javascript">
var date = new Date();
var end_time = 60*60+3 + (date.getTime() / 1000);
function show_time()
{
var date = new Date();
var now_time = date.getTime() / 1000;
var seconds = Math.floor(end_time - now_time);
document.getElementById("test").innerHTML = seconds;
/**
* 算法描述
* 时间差为秒数 s
* 小时 h = s / 60 / 60;
* 分 m = (s - (h*60*60)) / 60
* 秒 s = s%60;
*/
//小时
var hours = Math.floor(seconds/60/60);
//分
var minutes = Math.floor(((seconds - (hours*60*60))/60)%60);
//秒
var seconds = seconds%60;
//输出到html
document.getElementById("h").innerHTML = hours;
document.getElementById("m").innerHTML = minutes;
document.getElementById("s").innerHTML = seconds;
}
setInterval("show_time()",200);
</script>
</body>
</html>
- 上一篇：跨frameset frame js 调用
- 下一篇：js 回调 匿名函数