title: add css content text in 'empty' divs
body: <p>See this fiddle: <a href="http://jsfiddle.net/xanld/3yh28/">http://jsfiddle.net/xanld/3yh28/</a></p>
  
  <pre><code>div:before {
      content: 'This div is empty';
  }
  div:empty {
      background:red;
  }
  </code></pre>
  
  <p>I'd like to add css content to empty divs only. I can either use the :empty selector, but I need to use the :before selector in order to add content. Is it possible to use both?</p>
  
  <p>Thanks.</p>