js image and text code sharing to achieve lottery effect-JS Tutorial-php.cn

js image and text code sharing to achieve lottery effect

黄舟

Release： 2017-03-27 14:28:36

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1289 people have browsed it

This article mainly introduces js examples of methods to achieve the lottery effect. Has very good reference value. Let’s take a look at it with the editor below

Rendering:

##The code is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>随机抽奖</title>
  <style>
    *{margin: 0;padding: 0;}
    body{
       background:darksalmon;
    }
    h1,#ks,#js{
       text-align: center;
     }
    #ks{
       width: 100px;
       height: 70px;
       background: blueviolet;
       border-radius: 10px;
       line-height: 70px;
       margin:3% 0 0 40%;
     }
    #ks:hover{
      width: 100px;
      height: 70px;
      background: tomato;
      border-radius: 10px;
      line-height: 70px;
    }
    #js{
      width: 100px;
      height: 70px;
      background: blueviolet;
      border-radius: 10px;
      line-height: 70px;
      margin:-5% 0 0 50%;
    }
    #js:hover{
      width: 100px;
      height: 70px;
      background: tomato;
      border-radius: 10px;
      line-height: 70px;
    }
    .jp{
      border:3px solid #CD5C5C;
      border-radius:10px;
      width:95px;
      height:23px;
      background:#ff3030;
      padding-top:5px;
      text-align:center;
      color: #ff7ee1;
    }
    #jp{
      width: 100%;
      height: 200px;
      background: orangered;
      position: absolute;
      margin-top: 300px;
    }
    #jp span{
     font-size: 30px;
    }
    #tx{
      font-size: 60px;
      color: #fff;
    }
  </style>
</head>
<body>
   <h1>抽奖了</h1>
   <p id="ks" onclick="ks()">开始抽奖</p><!--如何通过一个按钮实现开始和关闭？-->
   <p id="js" onclick="gb()">停止抽奖</p>
   <p id="jp"><span>恭喜你获得了：</span><span id="tx"></span></p>
<script>
  var arr=["三星","苹果","华为·荣耀","小米","魅族","中兴·努比亚","酷派","vivo（蓝厂）","oppo(绿厂)"];
  //循环添加的数组
  var lieshu=3;//列数
  console.log(arr.length);
  console.log("可以分："+arr.length/lieshu+"行");
  for(var i=0;i<arr.length/lieshu;i++){//控制行数
    for(var j=0;j<lieshu;j++){//控制列
      if(i*lieshu+j<arr.length){
        console.log("循环最内层："+i*lieshu+j);
        document.write("<p id=\"jiang"+(i*lieshu+j)+"\" class=\"jp\" style =\"" +
          "position:absolute;left:"+(j*110+500)+"px;" +"top:" +(i*50+200)+"px;\">"+
          arr[i*lieshu+j]+"</p>");
           /*  document.write 网页内写文件
              i*lieshu+j 为个数
           *   (j*110+500) 110 为列边距 500为整个表格；列偏移
           *   (i*40+300)  40 行间距  300为整个表格；列偏移
           *
           * */
       }
    }
  }
  var bs=-1;//用于循环过后变色
  var t;
 function ks(){
   /* 开始变色的方法*/
   if(bs!=-1){
    document.getElementById("jiang"+bs).style.background="#ff3030";
    }
    var shuijisu=Math.floor(Math.random()*arr.length);//生成arr.length个 随机数向下取证
    document.getElementById("jiang"+shuijisu).style.background="#3500cc";

    bs =shuijisu;//shuijisu 代指添加元素的下表
    t =setTimeout("ks()",100);
 }
function gb() {
  clearTimeout(t);
  document.getElementById("tx").innerHTML =document.getElementById("jiang"+bs).innerHTML;
//修改id="tx"类的值

}
</script>
</body>
</html>

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