title: Regular Expression: Find html tags which have an attribute twice?
body: <p>Is it possible to find any tags which have an attributed declared twice?  More specifically, I'm wanting to scan through html documents and look for any markup which has class="" twice.</p>
  
  <p>So something akin to:</p>
  
  <pre><code>&lt;textarea class='something' id='nomatter' name='nomatter' class='different'&gt;
  </code></pre>
  
  <p>Thank you for your time and consideration!</p>