JS implements special effects code for rotating random number lottery

JS implements special effects code for rotating random number lottery_javascript skills

WBOY

Release： 2016-05-16 15:47:13

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Everyone has played lottery games, or dreamed of winning big prizes, but have you ever thought about how lottery games are implemented? Today I will share with you a JS special effects code for rotating random numbers to draw a lottery.

The implementation code is as follows

<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<script src="http://code.jquery.com/jquery-1.7.1.js" type="text/javascript"></script>
<style type="text/css">
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,form,img,dl,dt,dd,table,th,td,blockquote,fieldset,div,strong,label,em{margin:0;padding:0;border:0;}
ul,ol,li{list-style:none;}
input,button{margin:0;font-size:12px;vertical-align:middle;}
body{font-size:12px;font-family:Arial, Helvetica, sans-serif; text-align:center; margin:0 auto; background:url(../images/BG.jpg) repeat-y;}
table{border-collapse:collapse;border-spacing:0;}
.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:3px 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:1px solid red;}
</style>
</head>
<body>
<div class="box">
 <div class="inbox">
 <ul id="random_box">
 <li id="random_1">1</li>
 <li id="random_2">2</li>
 <li id="random_3">3</li>
 <li id="random_4">4</li>
 <li id="random_5">5</li>
 <li id="random_6">6</li>
 <li id="random_7">7</li>
 <li id="random_8">8</li>
 <li id="random_9">9</li>
 <li id="random_10">10</li>
 <li id="random_11">11</li>
 <li id="random_12">12</li>
 <li id="random_13">13</li>
 <li id="random_14">14</li> 
 </ul>
 <b class="ok" onClick="StartGame()">抽奖</b>
 </div>
</div>
<script>
var index=1,   //当前亮区位置
prevIndex=14,   //前一位置
Speed=300,   //初始速度
Time,   //定义对象
arr_length = 14; //GetSide(5,5),   //初始化数组
EndIndex=1,   //决定在哪一格变慢
cycle=0,   //转动圈数 
EndCycle=3,   //计算圈数
flag=false,   //结束转动标志
random_num=1,  //中奖数
quick=0;   //加速
 
 
function StartGame(){
$("#random_box li").removeClass("random_current"); //取消选中
 //random_num = parseInt($("#txtnum").val());//
 random_num = Math.floor(Math.random()*13+2); //产出随机中奖数2--12之间
 index=1; //再来一次,从1开始
 cycle=0;
 flag=false;
 //EndIndex=Math.floor(Math.random()*12);
 if(random_num>5) {
 EndIndex = random_num - 5; //前5格开始变慢
 } else {
 EndIndex = random_num + 14 - 5; //前5格开始变慢
 }
 //EndCycle=Math.floor(Math.random()*3);
 Time = setInterval(Star,Speed);
 
}
function Star(num){
 //跑马灯变速
 if(flag==false){
  //走五格开始加速
  if(quick==5){
   clearInterval(Time);
   Speed=50;
   Time=setInterval(Star,Speed);
  }
  //跑N圈减速
  if(cycle==EndCycle+1 && index-1==EndIndex){
  clearInterval(Time);
   Speed=300;
   flag=true;   //触发结束
   Time=setInterval(Star,Speed);
  }
 }
 
 if(index>arr_length){
  index=1;
  cycle++;
 }
 
 //结束转动并选中号码
 if(flag==true && index==parseInt(random_num)){ 
  quick=0;
  clearInterval(Time);
 }
 $("#random_"+index).addClass('random_current'); //设置当前选中样式
 if(index>1)
  prevIndex=index-1;
 else{
  prevIndex=arr_length;
 }
 $("#random_"+prevIndex).removeClass('random_current'); //取消上次选择样式 
 index++;
 quick++;
}
</script>
</body>
</html>

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Rendering achieved:

Nowadays, lottery games are widely used, and each of us will be exposed to them. Especially during holidays, major shopping malls will organize this type of game activities to attract customers. There is actually a lot that can be improved in the code I shared above. , rich places, for example, we can beautify its interface, make it more functional, and we can consider the speed of rotating random numbers to draw, and decide which grid will slow down, etc.

The above is the entire content of this article. I hope you like it and can practice it.