title: Change name of download in javascript
body: <p>If a user clicks on a downloadable link such as</p>
  
  <pre><code>&lt;a href="downloadable.txt"&gt;Download&lt;/a&gt;
  </code></pre>
  
  <p>Is there a client-side (html or javascript) way to change the name of the file before the 'Save As' dialog?</p>