Example sharing of jQuery implementation of verification code function-JS Tutorial-php.cn

Example sharing of jQuery implementation of verification code function

小云云

Release： 2018-01-22 13:03:21

Original

2101 people have browsed it

Many programming languages can implement the verification code function. This article mainly introduces the sample code of jQuery to implement the verification code function, which has a good reference value. Let’s take a look at it with the editor. I hope it can help everyone.

Rendering:

##The code is as follows:

<!doctype html>
<html lang="en">
 <head>
 <meta charset="UTF-8">
 <title>Document</title>
 <style type="text/css">
 #code{
 width:80px;
 height:30px;
 font-size:20px;
 font-family:Arial; 
 font-style:italic; 
 font-weight:bold; 
 border:0; 
 letter-spacing:2px; 
 color:blue; 
 }
 </style>
 </head>
 <body>
<p> 
 <input type = "text" id = "input"/> 
 <input type = "button" id="code" /> 
 <input type = "button" value = "验证" id="check"/> 
   </p> 
 <script type="text/javascript" src="http://libs.baidu.com/jquery/2.0.0/jquery.js"></script>
<script type="text/javascript">
  function change(){
    code=$("#code");
  // 验证码组成库
   var arrays=new Array( 
       &#39;1&#39;,&#39;2&#39;,&#39;3&#39;,&#39;4&#39;,&#39;5&#39;,&#39;6&#39;,&#39;7&#39;,&#39;8&#39;,&#39;9&#39;,&#39;0&#39;,
       &#39;a&#39;,&#39;b&#39;,&#39;c&#39;,&#39;d&#39;,&#39;e&#39;,&#39;f&#39;,&#39;g&#39;,&#39;h&#39;,&#39;i&#39;,&#39;j&#39;, 
       &#39;k&#39;,&#39;l&#39;,&#39;m&#39;,&#39;n&#39;,&#39;o&#39;,&#39;p&#39;,&#39;q&#39;,&#39;r&#39;,&#39;s&#39;,&#39;t&#39;, 
       &#39;u&#39;,&#39;v&#39;,&#39;w&#39;,&#39;x&#39;,&#39;y&#39;,&#39;z&#39;, 
       &#39;A&#39;,&#39;B&#39;,&#39;C&#39;,&#39;D&#39;,&#39;E&#39;,&#39;F&#39;,&#39;G&#39;,&#39;H&#39;,&#39;I&#39;,&#39;J&#39;, 
       &#39;K&#39;,&#39;L&#39;,&#39;M&#39;,&#39;N&#39;,&#39;O&#39;,&#39;P&#39;,&#39;Q&#39;,&#39;R&#39;,&#39;S&#39;,&#39;T&#39;, 
       &#39;U&#39;,&#39;V&#39;,&#39;W&#39;,&#39;X&#39;,&#39;Y&#39;,&#39;Z&#39;        
       ); 
    codes=&#39;&#39;;// 重新初始化验证码
   for(var i = 0; i<4; i++){
   // 随机获取一个数组的下标
   var r = parseInt(Math.random()*arrays.length);
   codes += arrays[r];
  }
  // 验证码添加到input里
     code.val(codes);
  }
  change();
 code.click(change);
 //单击验证
  $("#check").click(function(){
   var inputCode = $("#input").val().toUpperCase(); //取得输入的验证码并转化为大写 
   console.log(inputCode);
  if(inputCode.length == 0) { //若输入的验证码长度为0
   alert("请输入验证码！"); //则弹出请输入验证码
  }    
  else if(inputCode!=codes.toUpperCase()) { //若输入的验证码与产生的验证码不一致时
   alert("验证码输入错误!请重新输入"); //则弹出验证码输入错误
   change();//刷新验证码
   $("#input").val("");//清空文本框
  }else { //输入正确时
   alert("正确"); //弹出^-^
  } 
  });
</script>
 </body>
</html>

Copy after login

Related recommendations:

jQuery implements a simple verification code function example sharing

Pure JS implements the image verification code function ( Compatible with IE6-8) code

Using php to implement website verification code function code detailed explanation

The above is the detailed content of Example sharing of jQuery implementation of verification code function. For more information, please follow other related articles on the PHP Chinese website!