2024/02/01
编写一个简单的登录界面
<html> <head> <title>JSP - Hello World</title> </head> <body background="imagine/鸡哥头.jpg" style="background-repeat:no-repeat;background-attachment:fixed;background-size:100% 100%"> <div style="text-align: center"> <h1> 登录界面</h1><br> <form method="post" id="login" action="success.html"> 账号<input type="text" name="nameid" id="nameid"><br> 密码<input type="password" name="pwd" id="pwd"><br> <span id="msg" style="font-size: 12px;color:red"></span><br> <button type="button" id="btm">登录</button> </form> <script> document.getElementById("btm").addEventListener("click", function(){ var a=confirm("确认登录嘛?"); if(!a) { document.getElementById('msg').innerHTML="您已取消登录"; return; } var id=document.getElementById("nameid").value; var pwd=document.getElementById("pwd").value; if(!is(id)) { document.getElementById('msg').innerHTML="您的账号不能为空"; return; } if(!is(pwd)) { document.getElementById('msg').innerHTML="您的密码不能为空"; return; } document.getElementById('login').submit(); }); function is(s) { if (s.length==0||s.trim()=="") return false; else return true; } </script> </div> </body> </html>
登录时会跳出弹窗问是否确认登录
登录前会验证账号和密码是否为空,空的话会给出提示