9.24java wab实现创建新界面验证码
<!DOCTYPE html>
<html>
<head>
<title>User Login</title>
<style>
.container {
width: 300px;
margin: 0 auto;
padding: 20px;
border: 1px solid #ccc;
text-align: center;
}
.input-group {
margin-bottom: 10px;
}
.input-group label {
display: block;
margin-bottom: 5px;
}
.input-group input {
width: 100%;
padding: 5px;
}
.input-group img {
margin-top: 10px;
}
.input-group button {
width: 100%;
padding: 7px;
background-color: #4CAF50;
color: white;
border: none;
}
</style>
<script>
function generateCaptcha() {
var captcha = '';
var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
var captchaLength = 4;
for (var i = 0; i < captchaLength; i++) {
captcha += characters.charAt(Math.floor(Math.random() * characters.length));
}
// Display the generated captcha
document.getElementById('captcha').textContent = captcha;
// Update the captcha image source with the generated captcha
document.getElementById('captchaImage').src = 'https://dummyimage.com/150x50/000/fff&text=' + captcha;
}
function validateForm(event) {
event.preventDefault(); // Prevent form submission
var captchaInput = document.getElementById('captchaInput').value;
var captchaLabel = document.getElementById('captcha').textContent;
if (captchaInput.toUpperCase() === captchaLabel.toUpperCase()) {
// Correct captcha, perform actions for successful login
alert('Login successful!');
// Redirect to success page here
// Clear form data
document.getElementById('username').value = '';
document.getElementById('password').value = '';
document.getElementById('captchaInput').value = '';
// Generate a new captcha
generateCaptcha();
} else {
// Incorrect captcha, show error message
alert('Incorrect captcha!');
// Clear captcha input
document.getElementById('captchaInput').value = '';
// Generate a new captcha
generateCaptcha();
}
}
</script>
</head>
<body onload="generateCaptcha()">
<div class="container">
<h2>User Login</h2>
<form action="/login" method="post" onsubmit="validateForm(event)">
<div class="input-group">
<label for="username">Username:</label>
<input type="text" id="username" name="username" required>
</div>
<div class="input-group">
<label for="password">Password:</label>
<input type="password" id="password" name="password" required>
</div>
<div class="input-group">
<label for="captcha">Captcha:</label>
<input type="text" id="captchaInput" name="captcha" required>
<span id="captcha"></span>
<img src="" alt="Captcha" id="captchaImage">
<button type="button" onclick="generateCaptcha()">Refresh</button>
</div>
<div class="input-group">
<button type="submit">Login</button>
</div>
</form>
</div>
</body>
</html>
User Login
