最近写的一个大转盘的页面，感觉还挺有趣的。在写之前也是百度找相关资料，然后整合成自己喜欢的样子。
下面是代码部分：
1 <div class="num-box" id="lottery">
2 <table>
3 <tr>
4 <td class="box active lottery-unit lottery-unit-0">
5 <a href="javascript:;">
6 <img src="img/fee.png" alt="" />
7 </a>
8 </td>
9 <td class="box lottery-unit lottery-unit-1">
10 <a href="javascript:;">
11 <font class="num">50</font>
12 <p class="inner-text">积分</p>
13 </a>
14 </td>
15 <td class="box lottery-unit lottery-unit-2">
16 <a href="javascript:;">
17 <font class="num">8元</font>
18 <p class="inner-text">优惠券</p>
19 </a>
20 </td>
21 </tr>
22 <tr>
23 <td class="box lottery-unit lottery-unit-7">
24 <a href="javascript:;">
25 <font class="num">5元</font>
26 <p class="inner-text">优惠券</p>
27 </a>
28 </td>
29 <td class="btn-start"><a href="javascript:;"></a></td>
30 <td class="box lottery-unit lottery-unit-3">
31 <a href="javascript:;">
32 <font class="num">1元</font>
33 <p class="inner-text">优惠券</p>
34 </a>
35 </td>
36 </tr>
37 <tr>
38 <td class="box lottery-unit lottery-unit-6">
39 <a href="javascript:;">
40 <font class="num">10</font>
41 <p class="inner-text">积分</p>
42 </a>
43 </td>
44 <td class="box lottery-unit lottery-unit-5">
45 <a href="javascript:;">
46 <font class="num">10元</font>
47 <p class="inner-text">优惠券</p>
48 </a>
49 </td>
50 <td class="box lottery-unit lottery-unit-4">
51 <a href="javascript:;">
52 <font class="num">谢谢</font>
53 <font class="num">参与</font>
54 </a>
55 </td>
56 </tr>
57 </table>
58 </div>
1 var lottery={
2 index:-1, //当前转动到哪个位置，起点位置
3 count:0, //总共有多少个位置
4 timer:0, //setTimeout的ID，用clearTimeout清除
5 speed:20, //初始转动速度
6 times:0, //转动次数
7 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
8 prize:-1, //中奖位置
9 init:function(id){
10 if ($("#"+id).find(".lottery-unit").length>0) {
11 $lottery = $("#"+id);
12 $units = $lottery.find(".lottery-unit");
13 this.obj = $lottery;
14 this.count = $units.length;
15 $lottery.find(".lottery-unit-"+this.index).addClass("active");
16 };
17 },
18 roll:function(){
19 var index = this.index;
20 var count = this.count;
21 var lottery = this.obj;
22 $(lottery).find(".lottery-unit-"+index).removeClass("active");
23 index += 1;
24 if (index>count-1) {
25 index = 0;
26 };
27 $(lottery).find(".lottery-unit-"+index).addClass("active");
28 this.index=index;
29 return false;
30 },
31 stop:function(index){
32 this.prize=index;
33 return false;
34 }
35 };
36
37 function roll(){
38 lottery.times += 1;
39 lottery.roll();
40 if (lottery.times > lottery.cycle+10 && lottery.prize==lottery.index) {
41 clearTimeout(lottery.timer);
42 lottery.prize=-1;
43 lottery.times=0;
44 click=false;
45 }else{
46 if (lottery.times<lottery.cycle) {
47 lottery.speed -= 10;
48 }else if(lottery.times==lottery.cycle) {
49 var index = Math.random()*(lottery.count)|0;
50 lottery.prize = index;
51 }else{
52 if (lottery.times > lottery.cycle+10 && ((lottery.prize==0 && lottery.index==7) || lottery.prize==lottery.index+1)) {
53 lottery.speed += 110;
54 }else{
55 lottery.speed += 20;
56 }
57 }
58 if (lottery.speed<40) {
59 lottery.speed=40;
60 };
61 //console.log(lottery.times+'^^^^^^'+lottery.speed+'^^^^^^^'+lottery.prize);
62 lottery.timer = setTimeout(roll,lottery.speed);
63 }
64 return false;
65 }
66
67 var click=false;
68
69 window.onload=function(){
70 lottery.init('lottery');
71 $("#lottery .btn-start a").click(function(){
72 if (click) {
73 return false;
74 }else{
75 lottery.speed=100;
76 roll();
77 click=true;
78 return false;
79 }
80 });
81 };