jquery九宫格抽奖怎么控制停止位置

参考下面代码

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!--效果html开始--

div id="lottery"

table border="0" cellpadding="0" cellspacing="0"

tr

td class="lottery-unit lottery-unit-0"img src="images/1.png"/td

td class="lottery-unit lottery-unit-1"img src="images/2.png"/td

td class="lottery-unit lottery-unit-2"img src="images/4.png"/td

td class="lottery-unit lottery-unit-3"img src="images/3.png"/td

/tr

tr

td class="lottery-unit lottery-unit-11"img src="images/7.png"/td

td colspan="2" rowspan="2"a href="#"/a/td

td class="lottery-unit lottery-unit-4"img src="images/5.png"/td

/tr

tr

td class="lottery-unit lottery-unit-10"img src="images/1.png"/td

td class="lottery-unit lottery-unit-5"img src="images/6.png"/td

/tr

tr

td class="lottery-unit lottery-unit-9"img src="images/3.png"/td

td class="lottery-unit lottery-unit-8"img src="images/6.png"/td

td class="lottery-unit lottery-unit-7"img src="images/8.png"/td

td class="lottery-unit lottery-unit-6"img src="images/7.png"/td

/tr

/table

/div

js部分

script type="text/javascript" src="jquery-1.8.3.min.js"/script

script type="text/javascript"

var lottery={

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

init:function(id){

if ($("#"+id).find(".lottery-unit").length0) {

$lottery = $("#"+id);

$units = $lottery.find(".lottery-unit");

this.obj = $lottery;

this.count = $units.length;

$lottery.find(".lottery-unit-"+this.index).addClass("active");

};

},

roll:function(){

var index = this.index;

var count = this.count;

var lottery = this.obj;

$(lottery).find(".lottery-unit-"+index).removeClass("active");

index += 1;

if (indexcount-1) {

index = 0;

};

$(lottery).find(".lottery-unit-"+index).addClass("active");

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.timeslottery.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.speed40) {

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

jquery如何用按钮控制抽奖停止和开始

用线程控制，第一次点开始随机函数，再次点的时候停止线程运行，并输出最后一次运行随机函数的值

怎么用jquery限定积分抽奖条件,比如每20积分抽奖1次

用户积分是后台传递给你的，

你设置一个变量存起来判断就OK

如 var n = obj

if（n 20）{}