本篇内容主要讲解“JS怎么实现倒计时功能”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“JS怎么实现倒计时功能”吧!
HTML代码：
<div id="times_wrap" class="time_num">
距离结束时间：
<div class="time_w">
<b id="times_d" class="time"> </b>天
<b id="times_h" class="time"> </b>时
<b id="times_m" class="time"> </b>分
<b id="times_s" class="time"> </b>秒
</div>
</div>JavaScript代码：
<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"); // 设定结束时间
time_end = time_end.getTime();
function show_time(){
var time_now = new Date(); // 获取当前时间
time_now = time_now.getTime();
var time_distance = time_end - time_now; // 结束时间减去当前时间
var int_day, int_hour, int_minute, int_second;
if(time_distance >= 0){
// 天时分秒换算
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)
// 时分秒为单数时、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;
// 显示时间
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>到此，相信大家对“JS怎么实现倒计时功能”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
