title: Dynamic CSS Background URLs
body: <p>Consider this CSS Property:</p>
  
  <pre><code>background: url(http://images.something.com/background.png) left top repeat-x;
  </code></pre>
  
  <p>Is there a way to dynamically specify the URL being used in the external file (Meaning the URL is sort of automatically generated rather than hard-coded in the CSS file) ?</p>
  
  <p>Thanks.</p>