<!--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 */