先看一段jquery打造转盘随机数抽奖代码：
<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<script src="jquery-1.6.2.min.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; width:759px; height:611px; background:#ccc; margin:20px auto; }
.inbox{ width:751px; height:596px;position:relative;}
#random_box li{ position:absolute; width:144px; overflow:hidden; height:144px; border:3px solid #c7c5ca; background:#fff;}
#random_box li img{ width:144px; display:block; height:144px;}
.ok{ display:block; width: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>
希望对同学们有所帮助
