用html+css+js写一个登陆界面
时间: 2023-09-04 07:15:08 浏览: 62
好的,以下是一个简单的登录界面的HTML,CSS和JS代码:
HTML代码:
```html
<!DOCTYPE html>
<html>
<head>
<title>Login Form</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="container">
<h1>Login Form</h1>
<form>
<label for="username">Username:</label>
<input type="text" id="username" name="username" required>
<label for="password">Password:</label>
<input type="password" id="password" name="password" required>
<button type="submit" id="submit-btn">Login</button>
</form>
</div>
<script src="script.js"></script>
</body>
</html>
```
CSS代码:
```css
body {
background-color: #f2f2f2;
font-family: Arial, sans-serif;
}
.container {
margin: 100px auto;
background-color: #fff;
padding: 20px;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
max-width: 400px;
}
h1 {
text-align: center;
margin-bottom: 30px;
}
form {
display: flex;
flex-direction: column;
align-items: center;
}
label {
margin-top: 10px;
}
input {
padding: 10px;
margin-bottom: 20px;
border-radius: 5px;
border: none;
box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}
button {
padding: 10px 20px;
background-color: #4CAF50;
color: #fff;
border: none;
border-radius: 5px;
box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
cursor: pointer;
}
```
JS代码:
```js
const form = document.querySelector('form');
const submitBtn = document.querySelector('#submit-btn');
submitBtn.addEventListener('click', function(event) {
event.preventDefault();
const username = form.username.value;
const password = form.password.value;
if (username === '' || password === '') {
alert('Please enter a username and password.');
} else if (username === 'admin' && password === 'password') {
alert('Login successful!');
form.reset();
} else {
alert('Incorrect username or password. Please try again.');
form.reset();
}
});
```
这个登录界面包含一个包含用户名和密码输入字段的表单以及一个提交按钮。当用户点击提交按钮时,JavaScript代码将检查用户名和密码是否为空,是否正确,并相应地显示警报消息。CSS代码用于为页面提供样式。