title: How to obtain value of HTML <input type="image"> in the Servlet
body: <p>I have this code in my jsp</p>
  
  <pre><code>&lt;div class="controls"&gt;
      &lt;input type="image" class="sprite submit-button button" name="SubmitChangeCreds" value="ChangeUIDSubmit" src="../images/layout/transparent.png" /&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>In my servlet I am trying to get the value of this image like this</p>
  
  <pre><code>request.getParameter("SubmitChangeCreds")
  </code></pre>
  
  <p>But this is null.</p>
  
  <p>Help will be much appreciated.</p>