html5 + jquery-latest.min.js

Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>html5 + jquery-latest.min.js</title>
<script src="https://smartcaptcha.yandexcloud.net/captcha.js" defer></script>
</head>

<body>

<form action="handler.php" method="POST">
  
<p><label for="fname">Имя:</label><br>
  <input type="text" id="fname" name="fname" placeholder="Иван" required></p>
  
  <p><label for="lname">Фамилия:</label><br>
  <input type="text" id="lname" name="lname" placeholder="Иванов" required></p>
  
  <p><label for="lname">E-mail:</label><br>
  <input type="text" id="email" name="email" placeholder="name@example.org" required></p>
  
  <div id="captcha-container" class="smart-captcha" data-sitekey="ysc1_4Dg5SGFYZ7xCsFD7g7SRPhVgtN83TcMrqn3TbeR40568f4dc" style="height:100px;width:300px;"></div>
  
  <p><input type="submit" value="Отправить"></p>

</form>

</body>

</html>