jquery实现抽奖功能_JavaScript

本文实例为大家分享了jquery实现抽奖功能的具体代码，供大家参考，具体内容如下

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									<!DOCTYPE html>

									<html>

									 <head>

									 <meta charset="utf-8">

									 <title></title>

									 <style type="text/css">

									 #lottery {

									 width: 570px;

									 height: 510px;

									 margin: 0px auto;

									 border: 4px solid #ba1809;

									 }

									 #lottery table {

									 background-color: yellow;

									 }

									 #lottery table td {

									 position: relative;

									 width: 190px;

									 height: 170px;

									 text-align: center;

									 color: #333;

									 font-index: -999

									 }

									 #lottery table td img {

									 display: block;

									 width: 190px;

									 height: 170px;

									 }

									 #lottery table td a {

									 width: 190px;

									 height: 170px;

									 display: block;

									 text-decoration: none;

									 background: url(img/9.jpg) no-repeat top center;

									 }

									 #lottery table td a:hover {

									 background-image: url(img/11.jpg);

									 }

									 #lottery table td.active .mask {

									 display: block;

									 }

									 .mask {

									 width: 100%;

									 height: 100%;

									 position: absolute;

									 left: 0;

									 top: 0;

									 background-color: rgba(252, 211, 4, 0.5);

									 display: none;

									 }

									 </style>

									 </head>

									 <body>

									 <div id="lottery">

									 <table border="0" cellpadding="0" cellspacing="0">

									 <tr>

									  <td class="lottery-unit lottery-unit-0">

									  <img src="img/1.jpg">

									  <div class="mask"></div>

									  </td>

									  <td class="lottery-unit lottery-unit-1">

									  <img src="img/2.jpg">

									  <div class="mask"></div>

									  </td>

									  <td class="lottery-unit lottery-unit-2">

									  <img src="img/3.jpg">

									  <div class="mask"></div>

									  </td>

									 </tr>

									 <tr>

									  <td class="lottery-unit lottery-unit-7">

									  <img src="img/4.jpg">

									  <div class="mask"></div>

									  </td>

									  <!-- 点击触发抽奖 -->

									  <td><a href="#" rel="external nofollow" ></a></td>

									  <td class="lottery-unit lottery-unit-3">

									  <img src="img/5.jpg">

									  <div class="mask"></div>

									  </td>

									 </tr>

									 <tr>

									  <td class="lottery-unit lottery-unit-6">

									  <img src="img/6.jpg">

									  <div class="mask"></div>

									  </td>

									  <td class="lottery-unit lottery-unit-5">

									  <img src="img/7.jpg">

									  <div class="mask"></div>

									  </td>

									  <td class="lottery-unit lottery-unit-4">

									  <img src="img/8.jpg">

									  <div class="mask"></div>

									  </td>

									 </tr>

									 </table>

									 </div>

									 <script src="js/jquery.js"></script>

									 <script type="text/javascript">

									 var lot = $(".lottery-unit");

									 var nowIndex = -1; //记录添加激活类的下标

									 var btn = $("table").find("a")

									 console.log(btn)

									 var curIndex = null; //记录上一次坐标

									 var round = 0; //记录移动几圈

									 var n = 0; //记录移动了多少次

									 var timer = null; //旋转计时器

									 var priceIndex = (Math.random()*lot.length) | 0; //中奖的下标

									 console.log(priceIndex)

									 var isClick = true;

									 function move(){

									 n++;

									 nowIndex++;

									 if(n%8==0){

									 round++;

									 console.log("跑了"+round+"圈");

									 if(round>=3){

									  clearInterval(timer);

									  timer = setInterval(move,50)

									 }

									 if(round > 8){

									  clearInterval(timer);

									  timer = setInterval(move,1000)

									 }

									 }

									 // 第二种方式

									 // if(n>=8 && n<12){

									 // clearInterval(timer)

									 // timer = setInterval(move,50)

									 // }

									 // if(n>=12){

									 // clearInterval(timer)

									 // timer = setInterval(move,50)

									 // }

									 lot.filter(".lottery-unit-"+nowIndex).addClass("active")

									 // 当curIndex为0时，布尔值为false，所以要加curIndex==0

									 if(curIndex || curIndex==0){

									 lot.filter(".lottery-unit-"+curIndex).removeClass("active")

									 }

									 curIndex = nowIndex;

									 // 如何实现中奖

									 if(nowIndex == priceIndex && round > 8){

									 clearInterval(timer);

									 if(priceIndex==1){

									  setTimeout(function(){

									  alert("111111")

									  },1000)

									 }

									 // 重置参数

									 isClick = true;

									 round = 0;

									 nowIndex = -1;

									 curIndex = null;

									 priceIndex = (Math.random()*lot.length) | 0;

									 console.log("中奖的下标",priceIndex)

									 }

									 if(nowIndex>=lot.length-1){

									 nowIndex=-1;

									 }

									 }

									 btn.click(function(){

									 if(isClick){

									 console.log("开始抽奖");

									 isClick = false;

									 timer = setInterval(move,100);

									 }

									 })

									 </script>

									 </body>

									</html>