页面的head部分，需引入jQuery库和倒计时插件，并设置好页面的样式，代码如下：

<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/leftTime.min.js"></script>
<style type="text/css">
*,html,body{padding:0;margin:0;font-size:12px;outline: none;font-family:'Microsoft YaHei','Lantinghei SC','Open Sans',Arial,'Hiragino Sans GB','STHeiti','WenQuanYi Micro Hei','SimSun',sans-serif;}
.wrap-box{width:1100px;min-width:1100px; margin:6% auto;}
h1{line-height:2; font-size:30px; text-align: center; margin-bottom:40px;}
 table.data-table{width:100%;}
 table.data-table tr:odd{background:#dcebff;}
 table.data-table td{line-height:24px;padding:3px;vertical-align: top;}
 table.data-table th{height:50px;line-height:50px;padding: 3px;font-size:20px;text-align: left;}
 table.data-table .colspan-a{width:35%;}
 table.data-table .colspan-b{width:25%;}
 table.data-table .colspan-c{width:40%;}
 table.data-table td pre{display: block; padding:5px; border: 1px solid #00caff;background: #f8fcff;text-align: left;}
.testBtn-a{display: inline-block;height:30px;line-height:30px;padding:0 10px; border:0; border-radius:5px;color:#fff;background:rgb(65,133,244);cursor: pointer;}
.testBtn-a.on{background:#c9c9c9;color:#666;cursor: default;}
.data-show-box{line-height:30px;}
.date-tiem-span,.date-s-span{display: inline-block;font-size:18px; width:36px; height:30px;line-height:30px; text-align: center; color:#fff; border-radius:5px;}
.date-tiem-span{ background:#333;}
.date-s-span{ background:#f00;}
.date-select-a{margin-right:5px;}
</style>

页面的body部分，需设置好6种倒计时的对应内容，部分代码如下：

<div class="wrap-box">
	<h1>轻量级倒计时插件</h1>
	<table cellpadding="0" cellspacing="0" class="data-table">
		<tr>
			<th colspan="3">60秒倒计时</th>
		</tr>
		<tr>
			<td class="colspan-a"><button type="button" class="testBtn-a" id="dateBtn1">获取验证码</button></td>
			<td class="colspan-b"></td>
			<td class="colspan-c">
				<pre>$.leftTime(60,function(d){
//d.status,值true||false,倒计时是否结束;
//d.s,倒计时秒;
});</pre>
				
			</td>
		</tr>
		<script type="text/javascript">
			$(function(){
				//60秒倒计时
				$("#dateBtn1").on("click",function(){
					var _this=$(this);
					if(!$(this).hasClass("on")){
						$.leftTime(60,function(d){
							if(d.status){
								_this.addClass("on");
								_this.html((d.s=="00"?"60":d.s)+"秒后重新获取");
							}else{
								_this.removeClass("on");
								_this.html("获取验证码");
							}
						});
					}
				});
			});
		</script>
		<tr>
			<th colspan="3">120秒倒计时</th>
		</tr>
		<tr>
			<td class="colspan-a"><button type="button" class="testBtn-a" id="dateBtnB">获取验证码</button></td>
			<td class="colspan-b"></td>
			<td class="colspan-c">
				<pre>$.leftTime(120,function(d){
//d.status,值true||false,倒计时是否结束;
//parseInt(d.m)*60+parseInt(d.s))+"秒后重新获取";
},true);</pre>
				
			</td>
		</tr>
		<script type="text/javascript">
			$(function(){
				//120秒倒计时
				$("#dateBtnB").on("click",function(){
					var _this=$(this);
					if(!$(this).hasClass("on")){
						$.leftTime(120,function(d){
							if(d.status){
								_this.addClass("on");
								_this.html((parseInt(d.m)*60+parseInt(d.s))+"秒后重新获取");
							}else{
								_this.removeClass("on");
								_this.html("获取验证码");
							}
						},true);
					}
				});
			});
		</script>