用js写一个登录,注册页面
时间: 2024-05-10 16:18:24 浏览: 7
好的,以下是一个简单的登录和注册页面的示例代码:
```html
<!DOCTYPE html>
<html>
<head>
<title>Login/Register Page</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
font-family: Arial, sans-serif;
}
form {
margin: auto;
padding: 20px;
border: 1px solid #ccc;
border-radius: 5px;
max-width: 400px;
}
input[type="text"], input[type="password"], input[type="submit"] {
display: block;
margin: 10px 0;
padding: 10px;
width: 100%;
border: 1px solid #ccc;
border-radius: 5px;
font-size: 16px;
}
input[type="submit"] {
background-color: #4CAF50;
color: #fff;
cursor: pointer;
}
input[type="submit"]:hover {
background-color: #3e8e41;
}
.error {
color: red;
margin: 10px 0;
}
</style>
</head>
<body>
<h1>Login/Register</h1>
<form id="login-form" style="display: block;">
<h2>Login</h2>
<div id="login-error" class="error" style="display: none;"></div>
<label for="login-username">Username:</label>
<input type="text" id="login-username" name="username" required>
<label for="login-password">Password:</label>
<input type="password" id="login-password" name="password" required>
<input type="submit" value="Login">
<p>Don't have an account? <a href="#" onclick="showRegisterForm()">Register now</a></p>
</form>
<form id="register-form" style="display: none;">
<h2>Register</h2>
<div id="register-error" class="error" style="display: none;"></div>
<label for="register-username">Username:</label>
<input type="text" id="register-username" name="username" required>
<label for="register-password">Password:</label>
<input type="password" id="register-password" name="password" required>
<label for="register-confirm-password">Confirm Password:</label>
<input type="password" id="register-confirm-password" name="confirm-password" required>
<input type="submit" value="Register">
<p>Already have an account? <a href="#" onclick="showLoginForm()">Login now</a></p>
</form>
<script>
// show login form by default
document.getElementById("login-form").style.display = "block";
// function to show register form and hide login form
function showRegisterForm() {
document.getElementById("login-form").style.display = "none";
document.getElementById("register-form").style.display = "block";
}
// function to show login form and hide register form
function showLoginForm() {
document.getElementById("register-form").style.display = "none";
document.getElementById("login-form").style.display = "block";
}
// handle login form submission
document.getElementById("login-form").addEventListener("submit", function(event) {
event.preventDefault();
var username = document.getElementById("login-username").value;
var password = document.getElementById("login-password").value;
// perform login validation here
if (username === "myusername" && password === "mypassword") {
alert("Login successful!");
} else {
document.getElementById("login-error").innerHTML = "Invalid login credentials!";
document.getElementById("login-error").style.display = "block";
}
});
// handle register form submission
document.getElementById("register-form").addEventListener("submit", function(event) {
event.preventDefault();
var username = document.getElementById("register-username").value;
var password = document.getElementById("register-password").value;
var confirmPassword = document.getElementById("register-confirm-password").value;
// perform registration validation here
if (password !== confirmPassword) {
document.getElementById("register-error").innerHTML = "Passwords do not match!";
document.getElementById("register-error").style.display = "block";
} else {
alert("Registration successful!");
}
});
</script>
</body>
</html>
```
这是一个基本的 HTML、CSS 和 JavaScript 的结合体,可以实现简单的登录和注册功能。当用户点击“注册”按钮时,会在页面上显示注册表单,当用户点击“登录”按钮时,会在页面上显示登录表单。在表单提交时,JavaScript 代码会根据表单中的数据执行验证逻辑,并根据结果弹出相应的提示框。需要根据实际需求进行修改和完善。
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