效果图
hui.countdown = function(timer, domId, showType)函数说明
功能：在指定的dom内产生一个倒计时组件
参数：
1、到期时间，格式 xxxx-xx-xx hh:ii:ss
2、dom元素id
3、组件展示类型 [ 1 : x天x时x分x秒，2 : x时x分x秒，3 : x❌x 4 : ii:ss ]
演示代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>HUI</title>
<link rel="stylesheet" type="text/css" href="../css/hui.css" />
</head>
<body>
<header class="hui-header">
<div id="hui-back"></div>
<h1>HUI 倒计时组件</h1>
</header>
<div class="hui-wrap">
<div class="hui-common-title" style="margin-top:15px;">
<div class="hui-common-title-line"></div>
<div class="hui-common-title-txt">倒计时组件演示</div>
<div class="hui-common-title-line"></div>
</div>
<div style="padding:15px;">
<div style="padding:20px; border-radius:8px; background:#FFFFFF;">
<div style="text-align:center; line-height:28px; font-weight:700; padding-bottom:12px; font-size:16px;">距离活动开始</div>
<div id="countdown1"></div>
</div>
<div style="padding:20px; border-radius:8px; background:#FFFFFF; margin-top:20px;">
<div style="text-align:center; line-height:28px; font-weight:700; padding-bottom:12px; font-size:16px;">距离抢票时间</div>
<div id="countdown2"></div>
</div>
<div style="padding:20px; border-radius:8px; background:#FFFFFF; margin-top:20px;">
<div style="text-align:center; line-height:28px; font-weight:700; padding-bottom:12px; font-size:16px;">距离开幕时间</div>
<div id="countdown3"></div>
</div>
<div style="padding:20px; border-radius:8px; background:#FFFFFF; margin-top:20px;">
<div style="text-align:center; line-height:28px; font-weight:700; padding-bottom:12px; font-size:16px;">分秒倒计时</div>
<div id="countdown4"></div>
</div>
</div>
</div>
<script src="../js/hui.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
/*
* hui.countdown()函数说明：
* 参数1: 时间的标准格式 2018-09-01 12:50:10 [严格遵守系统会进行校验]
* 参数2: domId
* 参数3: 展示类型
* 1. xx天xx时xx分xx秒
* 2. xx时xx分xx秒
* 3. xx:xx:xx
* 4. xx:xx [xx分:xx秒]
*/
var dater = new Date();
var timer = (dater.getFullYear()+1) + '-01-01 12:00:00';
hui.countdown(timer, '#countdown1', 1);
hui.countdown(timer,'#countdown2', 2);
hui.countdown(timer,'#countdown3', 3);
hui.countdown(timer,'#countdown4', 4);
</script>
</body>
</html>