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Implementing lucky draw page based on JavaScript

亚连Original: 2018-05-26 16:44:432942browse

This article mainly introduces the implementation of lucky draw page based on JavaScript in detail, which has certain reference value. Interested friends can refer to

JS implements simple lucky draw page for everyone. For reference, the specific content is as follows

Rendering:

## Picture material:

The code is as follows, you can copy it and use it:

<!DOCTYPE html>
<html>
<head lang="en">
 <meta charset="UTF-8">
 <title>幸运抽奖页面</title>
 <style>
  /*CSS代码*/
  *{
   padding:0;
   margin:0;
  }
  .login-box{
   width:500px;
   height:430px;
   /* border:1px solid red;*/
   /*水平居中*/
   margin:100px auto;

　　　　　　　<!-- 此处需要修改为自己的图片路径 -->

   background: url(img/tx1.png) no-repeat;
   box-shadow: 0 0 2px rgba(0,0,0,.5);
  }
  .login{
   padding:5px;
   border:0 none;
   background: #0a88e1;
   color: white;
   font-size:12px;
   text-align: center;
   width:220px;
   line-height: 20px;
   margin-top:200px;
   margin-left:120px;
  }
 </style>
</head>
<body>
 <p class="login-box">
  <input type="button" value="点击开始抽奖" class="login" id="luckbtn" onclick="luck()"/>
 </p>
</body>
<script>
 //JS代码：幸运抽奖
 var no = prompt("请输入您的四位会员卡号：");
 //获取到抽奖按钮
 document.getElementById("luckbtn").value =no+"-欢迎你，点击开始抽奖" ;

 //当点击抽奖按钮的时候调用，幸运抽奖的规则及提醒，功能 function 函数
 function luck(){
  //系统随机生成一个0-10之间的随机整数 :Math.random() 0-1之间的浮点数
  var num = parseInt(Math.random()*10);
  /*alert(num);*/
  //随机数=会员卡号的百位数
  /* var gewei = no%10;
  alert(gewei);*/
  /*var shiwei = parseInt(no/10%10);
  alert(shiwei);*/
  var baiwei = parseInt(no/100%10);
  /*alert(baiwei);*/
  if(baiwei == num){
   alert("恭喜"+no+",您中奖了！");
  }else{
   alert("对不起，"+no+"，您没有中奖！");
  }
 }

</script>
</html>

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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