写一个小程序登录页面
时间: 2023-12-12 08:05:58 浏览: 22
以下是一个简单的 HTML/CSS/JavaScript 登录页面的示例:
```
<!DOCTYPE html>
<html>
<head>
<title>Login Page</title>
<style>
body {
font-family: Arial, Helvetica, sans-serif;
}
form {
border: 3px solid #f1f1f1;
}
input[type=text], input[type=password] {
width: 100%;
padding: 12px 20px;
margin: 8px 0;
display: inline-block;
border: 1px solid #ccc;
box-sizing: border-box;
}
button {
background-color: #4CAF50;
color: white;
padding: 14px 20px;
margin: 8px 0;
border: none;
cursor: pointer;
width: 100%;
}
button:hover {
opacity: 0.8;
}
.container {
padding: 16px;
}
.error {
color: red;
}
</style>
</head>
<body>
<h2>Login Form</h2>
<form>
<div class="container">
<label for="username"><b>Username</b></label>
<input type="text" placeholder="Enter Username" name="username" required>
<label for="password"><b>Password</b></label>
<input type="password" placeholder="Enter Password" name="password" required>
<button type="submit">Login</button>
</div>
<div class="container" style="background-color:#f1f1f1">
<span class="error" id="error"></span>
</div>
</form>
<script>
// Add event listener to the login form submit button
document.querySelector('form').addEventListener('submit', function(event) {
event.preventDefault(); // Prevent form submission
// Get username and password from form inputs
var username = document.querySelector('input[name=username]').value;
var password = document.querySelector('input[name=password]').value;
// Check if username and password are correct
if (username === 'myusername' && password === 'mypassword') {
alert('Login successful!');
} else {
document.querySelector('#error').innerHTML = 'Incorrect username or password.';
}
});
</script>
</body>
</html>
```
这个页面包含一个表单,其中有两个输入框(一个是用户名,一个是密码)和一个登录按钮。当用户点击登录按钮时,JavaScript 代码将获取输入框中的值,并检查它们是否与预定义的用户名和密码匹配。如果匹配,则弹出一个消息框表示登录成功;否则,将在页面上显示错误消息。