title: XSL Get filename from URL
body: <p>I need to get just the filename from this url:</p>
  
  <pre><code>http://feedproxy.google.com/~r/TEDTalks_video/~5/XT8k_DqlzGc/KarenArmstrong_2009G.mp4
  </code></pre>
  
  <p>So I need to get:</p>
  
  <pre><code>KarenArmstrong_2009G
  </code></pre>
  
  <p>I need the filename so I can add .jpg to it and another base url.</p>