title: Is there a way of sending form values without inputs
body: <p>Let say that I have the form below:</p>
  
  <pre><code>&lt;form action="sendMessage.php" method="post"&gt;
      &lt;label&gt;Subject&lt;/label&gt;&lt;input type="text"&gt;&lt;/input&gt;
      &lt;label&gt;Message&lt;/label&gt;&lt;input type="text"&gt;&lt;/input&gt;
      &lt;input type="submit"&gt;&lt;/input&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>How can I send an another value like topic(which is pre-defined) without creating an another element for that? Is it possible or do I have to make input element and style it with <code>display: none;</code></p>
  
  <p>The answer can contain html, javascript or jquery code.</p>