<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>AJAX form check</title>
</head>
<body>
<form action="validator.php" method="POST" id="myForm">
<label>Name: </label>
<input type="text" class="form-group" name="name" />
<span class="error-name error">Missing Name</span>
<br>
<label>Email: </label>
<input type="email" class="form-group" name="email" />
<span class="error-email error">Missing Email</span>
<br>
<button type="submit">Submit</button>
</form>
<div id="message"></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</body>
</html>