title: html validator versus SU:BADGE
body: <p>How to fix that </p>
  
  <pre><code>element "SU:BADGE" undefined &lt;su:badge layout="5"&gt;&lt;/su:badge&gt;
  </code></pre>
  
  <p>I use HTML 4.01 Transitional on my website ...</p>
  
  <p>The BADGE is from stumbleupon.com website </p>
  
  <p>Thank you . Regards.</p>