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网站建设计划书范文,网站seo怎么操作,java 存储到wordpress,芜湖做公司网站的下面是使用HTML和JavaScript实现的一个中文版登录界面，包含登录、注册和修改密码功能。注册成功后会显示提示信息，在登录成功后进入一个大大的欢迎页面。 1.代码展示 <!DOCTYPE html> <html lang"zh-CN"> <head><meta …

下面是使用HTML和JavaScript实现的一个中文版登录界面，包含登录、注册和修改密码功能。注册成功后会显示提示信息，在登录成功后进入一个大大的欢迎页面。

1.代码展示

<!DOCTYPE html>
<html lang="zh-CN">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>用户认证系统</title><style>body {font-family: Arial, sans-serif;display: flex;justify-content: center;align-items: center;height: 100vh;background-color: #f4f4f9;}.container {width: 300px;padding: 20px;background-color: white;box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);border-radius: 5px;text-align: center;}h2 {margin-bottom: 20px;}form {display: flex;flex-direction: column;}input[type="text"],input[type="password"] {margin-bottom: 10px;padding: 10px;border: 1px solid #ccc;border-radius: 5px;width: 100%;}button {padding: 10px;background-color: #007bff;color: white;border: none;border-radius: 5px;cursor: pointer;width: 100%;}button:hover {background-color: #0056b3;}.message {margin-top: 10px;}.success {color: green;}.error {color: red;}#welcome-container {width: 400px;padding: 40px;background-color: #d4edda;box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);border-radius: 10px;text-align: center;}#welcome-message {font-size: 24px;margin-bottom: 20px;}</style>
</head>
<body><div class="container" id="login-container"><h2>登录</h2><form id="login-form"><input type="text" id="login-username" placeholder="用户名" required><input type="password" id="login-password" placeholder="密码" required><button type="submit">登录</button></form><p class="message error" id="login-error"></p><p class="message"><a href="#" onclick="showRegisterForm(); return false;">注册新账号</a></p></div><div class="container" id="register-container" style="display: none;"><h2>注册</h2><form id="register-form"><input type="text" id="register-username" placeholder="用户名" required><input type="password" id="register-password" placeholder="密码" required><button type="submit">注册</button></form><p class="message success" id="register-success"></p><p class="message error" id="register-error"></p><p class="message"><a href="#" onclick="showLoginForm(); return false;">返回登录</a></p></div><div class="container" id="change-password-container" style="display: none;"><h2>修改密码</h2><form id="change-password-form"><input type="password" id="old-password" placeholder="旧密码" required><input type="password" id="new-password" placeholder="新密码" required><button type="submit">修改密码</button></form><p class="message error" id="change-password-error"></p><p class="message"><a href="#" onclick="showWelcomePage(); return false;">返回欢迎页面</a></p></div><div id="welcome-container" style="display: none;"><h2 id="welcome-message"></h2><button onclick="showChangePassword()">修改密码</button><button onclick="logout()">注销</button></div><script>let users = [];let currentUser = null;document.getElementById('login-form').addEventListener('submit', function(event) {event.preventDefault();const username = document.getElementById('login-username').value;const password = document.getElementById('login-password').value;const user = users.find(user => user.username === username && user.password === password);if (user) {currentUser = user;showWelcomePage();} else {document.getElementById('login-error').textContent = '无效的用户名或密码';}});document.getElementById('register-form').addEventListener('submit', function(event) {event.preventDefault();const username = document.getElementById('register-username').value;const password = document.getElementById('register-password').value;if (!users.find(user => user.username === username)) {users.push({ username, password });document.getElementById('register-success').textContent = '注册成功！';setTimeout(() => {document.getElementById('register-success').textContent = '';}, 3000);document.getElementById('register-username').value = '';document.getElementById('register-password').value = '';showLoginForm();} else {document.getElementById('register-error').textContent = '用户名已存在';}});document.getElementById('change-password-form').addEventListener('submit', function(event) {event.preventDefault();const oldPassword = document.getElementById('old-password').value;const newPassword = document.getElementById('new-password').value;if (currentUser && currentUser.password === oldPassword) {currentUser.password = newPassword;users = users.map(user => user.username === currentUser.username ? { ...user, password: newPassword } : user);document.getElementById('change-password-error').textContent = '密码修改成功';setTimeout(() => {document.getElementById('change-password-error').textContent = '';}, 3000);hideChangePassword();} else {document.getElementById('change-password-error').textContent = '旧密码不正确';}});function showWelcomePage() {document.getElementById('login-container').style.display = 'none';document.getElementById('register-container').style.display = 'none';document.getElementById('change-password-container').style.display = 'none';document.getElementById('welcome-container').style.display = 'block';document.getElementById('welcome-message').textContent = `欢迎, ${currentUser.username}`;}function logout() {currentUser = null;document.getElementById('welcome-container').style.display = 'none';document.getElementById('login-container').style.display = 'block';}function showRegisterForm() {document.getElementById('login-container').style.display = 'none';document.getElementById('register-container').style.display = 'block';document.getElementById('login-error').textContent = ''; // Clear login error message}function showLoginForm() {document.getElementById('register-container').style.display = 'none';document.getElementById('login-container').style.display = 'block';document.getElementById('register-success').textContent = ''; // Clear registration success messagedocument.getElementById('register-error').textContent = ''; // Clear registration error message}function showChangePassword() {document.getElementById('welcome-container').style.display = 'none';document.getElementById('change-password-container').style.display = 'block';}function hideChangePassword() {document.getElementById('change-password-container').style.display = 'none';document.getElementById('welcome-container').style.display = 'block';}</script>
</body>
</html>