很不错的JS老虎机抽奖代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>js抽奖特效</title>
<style type="text/css">
*{ margin: 0; padding: 0; font-size:12px;}
body{ background-color: #2C1914;font-family:"微软雅黑"; }
a img, ul, li { list-style: none; }
a{text-decoration:none; outline:none; font-size:12px;}
input, textarea, select, button { font-size: 100%;}
.abs{ position:absolute;}
.rel{ position:relative;}
.wrap{ min-height:1000px;}
.main{ height:718px; }
.con980{ width:980px; margin:0 auto;}
.header{ width:100%; height:50px;}
.play{ background:url() no-repeat; width:980px; height:625px; padding:22px 0 0 21px;}
td{width:187px; height:115px;background-color:#666; text-align:center; line-height:115px; font-size:80px; }
.playcurr{ background-color:#F60;}
.playnormal{ background-color:#666;}
.play_btn{ width:480px; height:115px; display:block; background-color:#F60;border:0; cursor:pointer;font-size:40px;}
.play_btn:hover{ background-position:0 -115px;}
.btn_arr{ left:255px; top:255px;}
</style>
</head>
<body>
<div class="wrap">
<div class="header"></div>
<div class="main">
   <div class="con980">
       <div class="play rel">
          <p class="btn_arr abs"><input value="点击抽奖" id="btn1" type="button" onclick="StartGame()" class="play_btn" ></p>
<table class="playtab" id="tb" cellpadding="0" cellspacing="1">
<tr>
    <td>1</td><td>2</td><td>3</td><td>4</td><td>5</td>
</tr>
<tr>
    <td>16</td><td></td><td></td><td></td><td>6</td>
</tr>
<tr>
    <td>15</td><td></td><td></td><td></td><td>7</td>
</tr>
<tr>
    <td>14</td><td></td><td></td><td></td><td>8</td>
</tr>
<tr>
    <td>13</td><td>12</td><td>11</td><td>10</td><td>9</td>
</tr>
</table>
            </div>
        </div>
     </div>
</div>
<script type="text/javascript">
function Trim(str){
    return str.replace(/(^\s*)|(\s*$)/g, "");
}
function GetSide(m,n){
    //初始化数组
    var arr = [];
    for(var i=0;i<m;i++){
        arr.push([]);
        for(var j=0;j<n;j++){
            arr[i][j]=i*n+j;
        }
    }
    //获取数组最外圈
    var resultArr=[];
    var tempX=0,
     tempY=0,
     direction="Along",
     count=0;
    while(tempX>=0 && tempX<n && tempY>=0 && tempY<m && count<m*n)
    {
        count++;
        resultArr.push([tempY,tempX]);
        if(direction=="Along"){
            if(tempX==n-1)
                tempY++;
            else
                tempX++;
            if(tempX==n-1&&tempY==m-1)
                direction="Inverse"
        }
        else{
            if(tempX==0)
                tempY--;
            else
                tempX--;
            if(tempX==0&&tempY==0)
                break;
        }
    }
    return resultArr;
}
var index=0,//亮区位置
prevIndex=0,//前一位置
Speed=300,//初始速度
Time,arr = GetSide(5,5),//初始化数组
EndIndex=0,//决定在哪一格变慢
tb = document.getElementById("tb"), //获取tb对象
cycle=0,//转动圈数
EndCycle=0,//计算圈数
flag=false,//结束转动标志
quick=0;//加速
btn = document.getElementById("btn1")
function StartGame(){
clearInterval(Time);
   cycle=0;
   flag=false;
   EndIndex=Math.floor(Math.random()*16);
   EndCycle=1;
   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==parseInt(EndIndex)){
         clearInterval(Time);
         Speed=300;
         flag=true;       //触发结束
         Time=setInterval(Star,Speed);
     }
    }
    if(index>=arr.length){
        index=0;
        cycle++;
    }
 //trim里改成数字就可以减速，变成Endindex的话就没有减速效果了
 if(flag==true && index==parseInt(Trim('5'))-1){
  quick=0;
  clearInterval(Time);
    }
    tb.rows[arr[index][0]].cells[arr[index][1]].className="playcurr";
    if(index>0)
        prevIndex=index-1;
    else{
        prevIndex=arr.length-1;
    }
    tb.rows[arr[prevIndex][0]].cells[arr[prevIndex][1]].className="playnormal";
    index++;
    quick++;
}
</script>
</body>
</html>