<script type="text/javascript">var index = 1,  //當前亮區位置prevIndex = 14,  //前一位置Speed = 300,  //初始速度Time,   //計時器arr_length = 14,  //獎池獎品數量EndIndex = 1,  //決定在哪一格變慢cycle = 0,   //計算圈數  EndCycle = 3,  //轉動多少圈后停下flag = false,  //結束轉動標志random_num = 1,  //中獎的格子quick = 0;   //多少格后開始加速function StartGame(){ $("#random_box li").removeClass("random_current"); //產出隨機中獎數1--14之間 //在實際應用中，中獎數應通過Ajax從后臺獲得，以確保中獎概率的可控性 random_num = Math.floor(Math.random() * 14 + 1); //從第一格開始轉動 index = 1; //圈數計數器置0 cycle = 0; flag = false; //中獎格子前5格開始變慢 if(random_num > 10) {  EndIndex = random_num - 10;  } else {  EndIndex = random_num + arr_length - 10; } Time = setInterval(Star,Speed);}function Star(num){  //跑馬燈變速  if(flag == false){ //走五格開始加速 if(quick == 5){  clearInterval(Time);  Speed=50;  Time=setInterval(Star,Speed); } //跑指定圈數后開始減速 if(cycle == EndCycle + 1 && index - 1 == EndIndex){  clearInterval(Time);  Speed = 300;  //觸發結束  flag = true;  Time = setInterval(Star,Speed); } }  if(index > arr_length){    index = 1;    cycle ++;  }  //結束轉動并選中號碼  if(flag == true && index==parseInt(random_num)){  quick = 0; clearInterval(Time);  }  //設置當前選中樣式  $("#random_"+index).addClass('random_current');   if(index > 1)    prevIndex = index - 1;  else{    prevIndex = arr_length;  }  //取消上次選擇樣式   $("#random_"+prevIndex).removeClass('random_current');   index ++;  quick ++;}</script>

<div class="box"> <div class="inbox"> <ul id="random_box">  <li id="random_1"><img src="images/img01.gif"></li>  <li id="random_2"><img src="images/img02.gif"></li>  <li id="random_3"><img src="images/ts.gif"></li>  <li id="random_4"><img src="images/img03.gif"></li>  <li id="random_5"><img src="images/img04.gif"></li>  <li id="random_6"><img src="images/ts.gif"></li>  <li id="random_7"><img src="images/img05.gif"></li>  <li id="random_8"><img src="images/img06.gif"></li>  <li id="random_9"><img src="images/img07.gif"></li>  <li id="random_10"><img src="images/ts.gif"></li>  <li id="random_11"><img src="images/img01.gif"></li>  <li id="random_12"><img src="images/img02.gif"></li>  <li id="random_13"><img src="images/ts.gif"></li>  <li id="random_14"><img src="images/img04.gif"></li>  </ul> <b class="ok" onclick="StartGame()">我要抽獎</b> </div></div>

/*  CSS Document Power by www.49028c.com*/body,p,ul,ol,li,img,div{margin:0;padding:0;border:0;}ul,li{list-style:none;}body{font-size:12px;font-family:Arial, Helvetica, sans-serif; text-align:center; margin:0 auto;}.box{ padding:9px 0 0 11px; width:759px; height:611px; background:#ccc; margin:20px auto; }.inbox{ width:751px; height:596px;position:relative;}#random_box li{ position:absolute; width:144px; overflow:hidden; height:144px; border:1px solid #c7c5ca; background:#fff;}#random_box li img{ width:144px; display:block; height:144px;}.ok{ display:block; width:442px; height:294px; background:#c00; color:#fff; font-size:48px; position:absolute; top:149px; left:148px; cursor:pointer; text-align:center; line-height:280px;}#random_1{ left:0; top:0;}#random_2{ left:148px;top:0;}#random_3{ left:296px;top:0;}#random_4{ left:444px;top:0;}#random_5{ left:592px;top:0; }#random_6{ left:592px;top:148px;}#random_7{ left:592px; top:298px;}#random_8{ left:592px; top:446px;}#random_9{ left:444px; top:446px;}#random_10{ left:296px; top:446px;}#random_11{ left:148px; top:446px;}#random_12{ left:0; top:446px;}#random_13{ left:0; top:298px;}#random_14{ left:0; top:148px;}#random_box li.random_current{border:2px solid red;}