jquery实现九宫格大转盘抽奖

this.index=index;
return false;
},
stop:function(index){
this.prize=index;
return false;
}
};

function roll(){
lottery.times += 1;
lottery.roll();
if (lottery.times > lottery.cycle+10 && lottery.prize==lottery.index) {
clearTimeout(lottery.timer);
lottery.prize=-1;
lottery.times=0;
click=false;
}else{
if (lottery.times<lottery.cycle) {
lottery.speed -= 10;
}else if(lottery.times==lottery.cycle) {
var index = Math.random()*(lottery.count)|0;
lottery.prize = index;
}else{
if (lottery.times > lottery.cycle+10 && ((lottery.prize==0 && lottery.index==7) || lottery.prize==lottery.index+1)) {
lottery.speed += 110;
}else{
lottery.speed += 20;
}
}
if (lottery.speed<40) {
lottery.speed=40;
};
//console.log(lottery.times+'^^^^^^'+lottery.speed+'^^^^^^^'+lottery.prize);
lottery.timer = setTimeout(roll,lottery.speed);
}
return false;
}

var click=false;

window.onload=function(){
lottery.init('lottery');
$("#lottery a").click(function(){
if (click) {
return false;
}else{
lottery.speed=100;
roll();
click=true;
return false;
}
});
};
</script>

CSS部分

/* 效果CSS开始 */
#lottery{width:574px;height:584px;margin:0px auto;background:url(../images/bg.jpg) no-repeat;padding:50px 55px;}
#lottery table td{width:142px;height:142px;text-align:center;vertical-align:middle;font-size:24px;color:#333;font-index:-999}
#lottery table td a{width:284px;height:284px;line-height:150px;display:block;text-decoration:none;}
#lottery table td.active{background-color:#ea0000;}
/* 效果CSS结束 */

JS中可设置参数： 

index:-1,    //当前转动到哪个位置，起点位置
count:0,    //总共有多少个位置
timer:0,    //setTimeout的ID，用clearTimeout清除
speed:20,    //初始转动速度
times:0,    //转动次数
cycle:50,    //转动基本次数：即至少需要转动多少次再进入抽奖环节
prize:-1,    //中奖位置

最后奉上演示图