<!DOCTYPE html>
<html lang="zh-CN">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>简易登录页面</title><style>* {margin: 0;padding: 0;box-sizing: border-box;}body {font-family: Arial, sans-serif;background-color: #f5f5f5;display: flex;justify-content: center;align-items: center;height: 100vh;}.login-container {background-color: white;padding: 40px;border-radius: 8px;box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);width: 100%;max-width: 400px;}h2 {text-align: center;color: #333;margin-bottom: 30px;}.form-group {margin-bottom: 20px;}label {display: block;margin-bottom: 5px;color: #666;}input {width: 100%;padding: 10px;border: 1px solid #ddd;border-radius: 4px;font-size: 16px;}input:focus {outline: none;border-color: #4CAF50;}.error-message {color: #f44336;font-size: 14px;margin-top: 5px;display: none;}.login-btn {width: 100%;padding: 12px;background-color: #4CAF50;color: white;border: none;border-radius: 4px;font-size: 16px;cursor: pointer;transition: background-color 0.3s;}.login-btn:hover {background-color: #45a049;}.login-btn:active {background-color: #3d8b40;}</style>
</head>
<body><div class="login-container"><h2>用户登录</h2><form id="loginForm"><div class="form-group"><label for="username">用户名</label><input type="text" id="username" name="username" placeholder="请输入用户名"><div class="error-message" id="usernameError">请输入用户名</div></div><div class="form-group"><label for="password">密码</label><input type="password" id="password" name="password" placeholder="请输入密码"><div class="error-message" id="passwordError">请输入密码</div></div><button type="submit" class="login-btn">登录</button></form></div><script>// 模拟的用户数据const mockUsers = [{ username: 'admin', password: '123456' },{ username: 'user', password: 'password' }];// 获取表单和输入元素const loginForm = document.getElementById('loginForm');const usernameInput = document.getElementById('username');const passwordInput = document.getElementById('password');const usernameError = document.getElementById('usernameError');const passwordError = document.getElementById('passwordError');// 表单提交事件loginForm.addEventListener('submit', function(e) {e.preventDefault();// 重置错误信息usernameError.style.display = 'none';passwordError.style.display = 'none';// 获取输入值const username = usernameInput.value.trim();const password = passwordInput.value.trim();// 验证输入let isValid = true;if (username === '') {usernameError.style.display = 'block';isValid = false;}if (password === '') {passwordError.style.display = 'block';isValid = false;}if (isValid) {// 验证用户const user = mockUsers.find(u => u.username === username && u.password === password);if (user) {alert('登录成功！欢迎 ' + username);// 这里可以重定向到主页或其他页面// window.location.href = 'home.html';} else {alert('用户名或密码错误！');}}});// 输入时隐藏错误信息usernameInput.addEventListener('input', function() {usernameError.style.display = 'none';});passwordInput.addEventListener('input', function() {passwordError.style.display = 'none';});</script>
</body>
</html>
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