title: How can my Greasemonkey script find links with a specific pattern?
body: <p>My target page has some links like:</p>
  
  <pre><code>http://example.com/ref.php?564646 
  </code></pre>
  
  <p>where the number varies.</p>
  
  <p>How can I find these links and show them at the top of the page using a Greasemonkey script?</p>