title: Making a footer stick to the bottom of a page without extraneous markup
body: <p>If you only had to worry about Firefox and Webkit browsers, what CSS would you use to make the footer in the following HTML stick to the bottom of the page? <em>Note:</em> I don't want to add any of markup to the page.</p>
  
  <pre><code>&lt;html&gt;
      &lt;body&gt;
          &lt;header&gt;...&lt;/header&gt;
          &lt;article&gt;...&lt;/article&gt;
          &lt;aside&gt;...&lt;/aside&gt;
          &lt;footer&gt;...&lt;/footer&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>