js implementation of big carousel lottery game example_javascript skills-JS Tutorial-php.cn

js implementation of big carousel lottery game example_javascript skills

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Release： 2016-05-16 15:53:06

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The example in this article describes the implementation of the big carousel lottery game using js. Share it with everyone for your reference. The specific implementation method is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
 <title>js抽奖</title>
 <style type="text/css">
  td{width:50px;height:50px;border:3px solid #ccc;text-align:center;vertical-align:middle}
 </style>
</head>
<body>
<table id="tb">
<tr>
 <td>1</td><td>2</td><td>3</td><td>4</td><td>5</td>
</tr>
<tr>
 <td>16</td><td></td><td></td><td></td><td>6</td>
</tr>
<tr>
 <td>15</td><td></td><td></td><td></td><td>7</td>
</tr>
<tr>
 <td>14</td><td></td><td></td><td></td><td>8</td>
</tr>
<tr>
 <td>13</td><td>12</td><td>11</td><td>10</td><td>9</td>
</tr>
</table>
<p></p>
请输入1-16其中一位整数，代表要停止的位置<input id="txtnum" value="12" type="text" /><input type="button" value="开始" onclick="StartGame()" />
 <script type="text/javascript">
  /*
  * 删除左右两端的空格
  */
  function Trim(str){
   return str.replace(/(^\s*)|(\s*$)/g, ""); 
  }
  /*
   * 定义数组
   */
  function GetSide(m,n){
   //初始化数组
   var arr = [];
   for(var i=0;i<m;i++){
    arr.push([]);
    for(var j=0;j<n;j++){
     arr[i][j]=i*n+j;
    }
   }
   //获取数组最外圈
   var resultArr=[];
   var tempX=0,
    tempY=0,
    direction="Along",
    count=0;
   while(tempX>=0 && tempX<n && tempY>=0 && tempY<m && count<m*n)
   {
    count++;
    resultArr.push([tempY,tempX]);
    if(direction=="Along"){
     if(tempX==n-1)
      tempY++;
     else
      tempX++;
     if(tempX==n-1&&tempY==m-1)
      direction="Inverse"
    }
    else{
     if(tempX==0)
      tempY--;
     else
      tempX--;
     if(tempX==0&&tempY==0)
      break;
    }
   }
   return resultArr;
  }
  var index=0,   //当前亮区位置
  prevIndex=0,   //前一位置
  Speed=300,   //初始速度
  Time,   //定义对象
  arr = GetSide(5,5),   //初始化数组
   EndIndex=0,   //决定在哪一格变慢
   tb = document.getElementById("tb"),  //获取tb对象 
   cycle=0,   //转动圈数 
   EndCycle=0,   //计算圈数
  flag=false,   //结束转动标志 
  quick=0;   //加速
  function StartGame(){
   cycle=0;
   flag=false;
   EndIndex=Math.floor(Math.random()*16);
   //EndCycle=Math.floor(Math.random()*4);
  EndCycle=1;
   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==EndIndex){
    clearInterval(Time);
     Speed=300;
     flag=true;   //触发结束
     Time=setInterval(Star,Speed);
    }
   }
   if(index>=arr.length){
    index=0;
    cycle++;
   }
   //结束转动并选中号码
   if(flag==true && index==parseInt(Trim(document.getElementById("txtnum").value))-1){ 
   quick=0;
   clearInterval(Time);
   }
   tb.rows[arr[index][0]].cells[arr[index][1]].style.border="3px solid red";
   if(index>0)
    prevIndex=index-1;
   else{
    prevIndex=arr.length-1;
   }
   tb.rows[arr[prevIndex][0]].cells[arr[prevIndex][1]].style.border="3px solid #ccc";
   index++;
   quick++;
  }
  /*
  window.onload=function(){
   Time = setInterval(Star,Speed);
  }
  */
 </script>
</body>
</html>

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I hope this article will be helpful to everyone’s JavaScript programming design.