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JS实现转动随机数抽奖的特效代码
- <!Doctype html>
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=GBK">
- <script src="http://code.jquery.com/jquery-1.7.1.js" type="text/javascript"></script>
- <style type="text/css">
- body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,form,img,dl,dt,dd,table,th,td,blockquote,fieldset,div,strong,label,em{margin:0;padding:0;border:0;}
- ul,ol,li{list-style:none;}
- input,button{margin:0;font-size:12px;vertical-align:middle;}
- body{font-size:12px;font-family:Arial, Helvetica, sans-serif; text-align:center; margin:0 auto; background:url(../images/BG.jpg) repeat-y;}
- table{border-collapse:collapse;border-spacing:0;}
- .box{ padding:9px 0 0 11px; 759px; height:611px; background:#ccc; margin:20px auto; }
- .inbox{ 751px; height:596px;position:relative;}
- #random_box li{ position:absolute; 144px; overflow:hidden; height:144px; border:3px solid #c7c5ca; background:#fff;}
- #random_box li img{ 144px; display:block; height:144px;}
- .ok{ display:block; 442px; height:294px; background:#c00; color:#fff; font-size:48px; position:absolute; top:149px; left:148px; cursor:pointer; text-align:center; line-height:280px;}
- #random_1{ left:0; top:0;}
- #random_2{ left:148px;top:0;}
- #random_3{ left:296px;top:0;}
- #random_4{ left:444px;top:0;}
- #random_5{ left:592px;top:0; }
- #random_6{ left:592px;top:148px;}
- #random_7{ left:592px; top:298px;}
- #random_8{ left:592px; top:446px;}
- #random_9{ left:444px; top:446px;}
- #random_10{ left:296px; top:446px;}
- #random_11{ left:148px; top:446px;}
- #random_12{ left:0; top:446px;}
- #random_13{ left:0; top:298px;}
- #random_14{ left:0; top:148px;}
- #random_box li.random_current{border:1px solid red;}
- </style>
- </head>
- <body>
- <div class="box">
- <div class="inbox">
- <ul id="random_box">
- <li id="random_1">1</li>
- <li id="random_2">2</li>
- <li id="random_3">3</li>
- <li id="random_4">4</li>
- <li id="random_5">5</li>
- <li id="random_6">6</li>
- <li id="random_7">7</li>
- <li id="random_8">8</li>
- <li id="random_9">9</li>
- <li id="random_10">10</li>
- <li id="random_11">11</li>
- <li id="random_12">12</li>
- <li id="random_13">13</li>
- <li id="random_14">14</li>
- </ul>
- <b class="ok" onClick="StartGame()">抽奖</b>
- </div>
- </div>
- <script>
- var index=1, //当前亮区位置
- prevIndex=14, //前一位置
- Speed=300, //初始速度
- Time, //定义对象
- arr_length = 14; //GetSide(5,5), //初始化数组
- EndIndex=1, //决定在哪一格变慢
- cycle=0, //转动圈数
- EndCycle=3, //计算圈数
- flag=false, //结束转动标志
- random_num=1, //中奖数
- quick=0; //加速
-
-
- function StartGame(){
- $("#random_box li").removeClass("random_current"); //取消选中
- //random_num = parseInt($("#txtnum").val());//
- random_num = Math.floor(Math.random()*13+2); //产出随机中奖数2--12之间
- index=1; //再来一次,从1开始
- cycle=0;
- flag=false;
- //EndIndex=Math.floor(Math.random()*12);
- if(random_num>5) {
- EndIndex = random_num - 5; //前5格开始变慢
- } else {
- EndIndex = random_num + 14 - 5; //前5格开始变慢
- }
- //EndCycle=Math.floor(Math.random()*3);
- Time = setInterval(Star,Speed);
-
- }
- function Star(num){
- //跑马灯变速
- if(flag==false){
- //走五格开始加速
- if(quick==5){
- clearInterval(Time);
- Speed=50;
- Time=setInterval(Star,Speed);
- }
- //跑N圈减速
- if(cycle==EndCycle+1 && index-1==EndIndex){
- clearInterval(Time);
- Speed=300;
- flag=true; //触发结束
- Time=setInterval(Star,Speed);
- }
- }
-
- if(index>arr_length){
- index=1;
- cycle++;
- }
-
- //结束转动并选中号码
- if(flag==true && index==parseInt(random_num)){
- quick=0;
- clearInterval(Time);
- }
- $("#random_"+index).addClass('random_current'); //设置当前选中样式
- if(index>1)
- prevIndex=index-1;
- else{
- prevIndex=arr_length;
- }
- $("#random_"+prevIndex).removeClass('random_current'); //取消上次选择样式
- index++;
- quick++;
- }
- </script>
- </body>
- </html>
-
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原文地址:https://www.cnblogs.com/czh-blog/p/6687148.html
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