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Yuansheng js implements lottery function

php中世界最好的语言Original: 2018-04-19 13:45:191668browse

This time I will bring you Yuanshengjs to implement the lottery function. What are the precautions for Yuanshengjs to implement the lottery function? The following is a practical case, let's take a look.

Rendering:

<!DOCTYPE html><htmllang="en"><head>  <metacharset="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>   <pid="ks"onclick="ks()">开始抽奖</p><!--如何通过一个按钮实现开始和关闭？-->   <pid="js"onclick="gb()">停止抽奖</p>   <pid="jp"><span>恭喜你获得了：</span><spanid="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(varj=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>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website !

Yuansheng js implements lottery function

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