当前位置：网站首页>Click to generate 4-bit random number and verify code setting

Click to generate 4-bit random number and verify code setting

2022-06-12 12:04:00 【Mustang (Mustang)】

Click to generate 4-digit random digits and numbers 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title> Click to generate random number </title>
    <style>
    span{
        display: block;
        width: 110px;
        height: 50px;
        border: 1px solid red;
        text-align: center;
        line-height: 50px;
    }
    </style>
</head>
<body>
    <span id="demo" onclick="init();"></span>
    <script>
        init();
        function  init(){
        var arr=[];
        for(var i=48;i<123;i++){
         if(i>57 && i<65) continue;
         if(i>90 && i<97) continue;
         arr.push(String.fromCharCode(i));
        }
        arr.sort(function () {
         return Math.random()-0.5;
        });
        arr.length=4;
       
        var span= document.getElementById('demo');
        span.textContent=(arr.join(""));
               }
    
    </script>
</body>
</html>
原网站

版权声明
本文为[Mustang (Mustang)]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/163/202206121158415627.html

边栏推荐

猜你喜欢

随机推荐