九方格抽奖插件

 1 var num = 0; //当前点亮的灯
 2   var circle = 0; //至少转跑马灯的圈数
 3   var t; //定时器
 4   var len;//奖品个数
 5   function lightChange($prizes, changeClass, prizeArr, prizeNum){
 6       var self = this;
 7       len = $prizes.length;
 8 
 9       $prizes.removeClass(changeClass);
10       $prizes.eq(prizeArr[num]).addClass(changeClass);
11       if(num == len-1){
12         num = 0;
13         circle ++;
14       } else {
15         num ++;
16       }
17 
18       if(circle == 2 && num == prizeNum){
19         circle = 0;
20         clearTimeout(t);
21       } else {
22         t = setTimeout(function(){lightChange($prizes, changeClass, prizeArr, prizeNum)},300); 
23       }
24     }