抽奖
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
2 <html>
3 <head>
4 <title> 抽奖活动 </title>
5 <meta name="Generator" content="EditPlus">
6 <meta name="Author" content="">
7 <meta name="Keywords" content="">
8 <meta name="Description" content="">
9 </head>
10
11 <body>
12
13 <html>
14 <head>
15 <meta http-equiv="Content-Type" content="text/html;charset=gb2312"/>
16 <meta http-equiv="Content-Language" content="zh-CN"/>
17 <title>抽奖活动</title>
18 <style type="text/css">
19 body {padding-top:100px;font:12px "\5B8B\4F53",sans-serif;text-align:center;}
20 .result_box {margin:0 auto;width:700px;padding:100px 0;text-align:center;border:3px solid #40AA53;background:#efe;}
21 .result_box #oknum {width:700px;color:#cc0000;font-size:50pt;font-family:Verdana;text-align:center;border:none;background:#efe;}
22 .button_box {margin:50px 0 0 0;}
23 .button_box .btn {cursor:pointer;padding:0 30px;margin:0 10px;color:#555;font-family:"\5B8B\4F53",sans-serif;font-size:40px;}
24 </style>
25 </head>
26 <body>
27 <script type="text/javascript">
28 //抽奖数据，以英文逗号分隔
29 var alldata = "张三,李四,王五,赵六,小三,小舞,白虎,金刚,狼牙,梦晓轩,紫电";
30 var alldataarr = alldata.split(",");
31 var num = alldataarr.length-1;
32 var timer;
33 function change(){
34 document.getElementById("oknum").value = alldataarr[GetRnd(0,num)];
35 }
36 function start(){
37 clearInterval(timer);
38 timer = setInterval('change()',50); //随机数据变换速度，越小变换的越快
39 }
40 function ok(){
41 clearInterval(timer);
42 //以下代码表示获得奖的，不能再获奖了。 重置刷新页面即可。
43 alldata = alldata.replace(document.getElementById("oknum").value,"").replace(",,",",");
44 // 去掉前置，最末尾的,
45 if (alldata.substr(0,1)==",")
46 {
47 alldata = alldata.substr(1,alldata.length);
48 }
49 if (alldata.substr(alldata.length-1,1)==",")
50 {
51 alldata = alldata.substring(0,alldata.length-1);
52 }
53 alldataarr = alldata.split(",");
54 num = alldataarr.length-1;
55 }
56 function GetRnd(min,max){
57 return parseInt(Math.random()*(max-min+1));
58 }
59 </script>
60 <div class="result_box"><input type="text" readonly="true" id="oknum" name="oknum" value="抽奖结果" /></div>
61 <div class="button_box"><button class="btn" onclick="start()" accesskey="s">开始(<U>S</U>)</button><button class="btn" onclick="ok()" accesskey="o">停止(<U>O</U>)</button></div>
62 </body>
63 </html>
64 </body>
65 </html>
效果：
标签：box,抽奖,length,font,alldataarr,alldata From： https://www.cnblogs.com/mxx520/p/17819557.html