How to implement a simple login page in HTML-HTML Tutorial-php.cn

How to implement a simple login page in HTML

醉折花枝作酒筹

Release： 2021-04-25 18:28:12

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This article introduces how to implement a simple login page in HTML. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

How to implement a simple login page in HTML

This is a simple static html page login image. I wrote it before. I didn’t understand the verification code. I refer to it again here, but some functions are not available yet. Complete. For reference only

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>静态页面登录测试</title> 
 
 <script language="javascript">
 window.onload = function() {
  createCode()
 }
 var code; //在全局定义验证码 
 function createCode() {
  code = "";
  var codeLength = 4; //验证码的长度 
  var checkCode = document.getElementById("code");
  var random = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, &#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;); //随机数 
  for(var i = 0; i < codeLength; i++) { //循环操作 
  var index = Math.floor(Math.random() * 36); //取得随机数的索引（0~35） 
   code += random[index]; //根据索引取得随机数加到code上 
  }
  checkCode.value = code; //把code值赋给验证码 
 }
 //校验验证码 
function validateLogin(){
    var sUserName = document.frmLogin.username.value ;
    var sPassword = document.frmLogin.password.value ;
    var inputCode = document.frmLogin.text_code.value;
    /*var sinputCode =document.frmLogin.inputcode.value ;  */
    if ((sUserName.length <= 0) || (sUserName=="")){
     alert("请输入用户名!");
     return false ;
    }
     
    if ((sPassword.length <= 0) || (sPassword=="")){
     alert("请输入密码!");
     return false ;
    }
    if ((inputCode.length<= 0) || (inputCode==NULL)){
        alert("请输入验证码!");
        return false ;
       }
   } 
  </script>
</head>
<body >
<fieldset>
<table background="images\e.jpg " width="933" height="412">
 <tr height="170">
 <td width="570px"> </td>
 <td> </td>
 </tr> 
 <tr>
<td> </td>        
<td><table>
<form method ="POST" action="http://localhost:8080/test/hello.html?login=%B5%C7%C2%BC" name="frmLogin"  >
 <tr>
 <td><label for="username">用户名：</label></td>
 <td><input type="text" name="username"  id="username" placeholder="input your name" size="20" maxlength="20" /></td>
 <td > </td>
 <td> </td>
 </tr>
 <tr>
 <td><label for="password">密  码：</label></td>
 <td><input type="password" name="password" id="password" placeholder="input your password" size="20" maxlength="20" )  this.value=&#39;&#39;;" /></td>
 <td> </td>
 <td> </td>
 </tr>
 <tr>
 <td><label for="text_code">验证码:</label></td>
 <td><input type="text" size="" name="text_code" id="text_code" /></td>
 <td><input type="button" id="code" onclick="createCode()" name=""></td>
 </tr>
 <tr>
 <td><input type="checkbox" name="zlogin" value="1">自动登录</td>
 </tr>
 </table>
 </td>
  <tr>
  <td> </td>   
  <td><table>
   <tr>
  <td><input type="submit" name="login" value="登录" onClick="return validateLogin()"/></td>
  <td><input type="reset" name="rs" value="重置"></td>
  <td><input type="button" name="button" value="注册" onclick="window.location.href=&#39;https://www.w3school.com.cn/jsref/event_onfocus.asp&#39;"></td>
  </tr>
 </tr>
 </table>
 </td>
 </table>
</fieldset>
</form>
 
</body>
</html>

Copy after login

As shown in the figure after execution

Recommended learning:html video tutorial

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