jquery实现九宫格大转盘抽奖

<!--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>

<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").length>0) {			$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 (index>count-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.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>

/* 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 */