下面我们来分享一个九宫格抽奖特效
特效说明：
一款jQuery九宫格大转盘抽奖代码网页特效，点击抽奖按钮开始随机抽奖选择奖品，可设置起点位置、奖品数量、转动次数、中奖位置参数。（兼容测试：IE7及以上、Firefox、Chrome、Opera、Safari、360等主流浏览器）
HTML:
<!--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").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");
