1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4 <meta charset="UTF-8">
 5 <title>抽奖游戏</title>
 6 <style>
 7 #box{
 8     width:720px;
 9     margin:0 auto;
10     margin-top:20px;
11     box-shadow:0px 0px 2px #333;
12 }
13 .pic{
14     width:200px;
15     height:200px;
16     float:left;
17     line-height:200px;
18     margin:10px;
19     border:5px #fff solid;
20     color:blue;
21     font-size: 35px;
22     text-align: center;
23 }
24 .anniu{
25     width:200px;
26     height:200px;
27     float:left;
28     margin:10px;
29 }
30 #drawBtn{
31     color:red;
32     font-size:30px;
33     width:200px;
34     height:200px;
35     box-shadow:0px 0px 2px #333;
36     font-weight: bold;
37 }
38     </style>
39     <script>
40     window.onload=init;
41         var setting={
42         count:0,
43         total:24,
44         delay:20,
45         picIndex:[0,1,2,4,7,6,5,3]
46     }
47         function init(){
48         document.getElementById("drawBtn").onclick=function(){
49             setting.count=0;
50             setting.delay=20;
51             this.disable=true;//禁用按钮
52             var drawBtn=this;
53             //获取所有图片的div
54             var allDivs=document.getElementsByClassName("pic");
55             //获得一个随机整数，代表中奖的那个位置，3*8+(0-7)
56             setting.total+=Math.floor(Math.random()*allDivs.length);
57             //设置定时器，依次修改每个div边框的颜色.
58             setTimeout(function show(){
59                 //重置上一个边框的颜色
60               for (var i=0;i<allDivs.length;i++){
61                   allDivs[i].style.borderColor="#fff";
62                   allDivs[i].style.opacity=0.7;
63               }
64                 //找到要修改的那个边框的颜色设置
65                     var currentPic=allDivs[setting.picIndex[setting.count%8]];
66                     currentPic.style.borderColor="red";
67                     currentPic.style.opacity=1.0;
68                 setting.count++;
69                 setting.delay+=2*setting.count;
70                     if(setting.count>setting.total){
71                         alert("您中奖了，哈哈");
72                         drawBtn.disable=false;
73                         return;
74                     }
75                     setTimeout(show,setting.delay);
76             },setting.delay);
77         }
78         }
79     </script>
80 </head>
81 <body>
82 <div id="box">
83     <div class="pic">1</div>
84     <div class="pic">2</div>
85     <div class="pic">3</div>
86     <div class="pic">4</div>
87     <div class="anniu"><input type="button" value="我要抽奖" id="drawBtn"/></div>
88     <div class="pic">5</div>
89     <div class="pic">6</div>
90     <div class="pic">7</div>
91     <div class="pic">8</div>
92 </div>
93 </body>
94 </html>