<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/jquery@3.6.1/dist/jquery.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>Custom Select Menu</h2>
<p>To create a custom select menu, add the .custom-select class to the select element:</p>
<form action="https://www.w3schools.com/action_page.php">
<select name="cars" class="custom-select mb-3">
<option selected>Custom Select Menu</option>
<option value="volvo">Volvo</option>
<option value="fiat">Fiat</option>
<option value="audi">Audi</option>
</select>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
</body>