title: Jquery: Check if Div is empty and then add css if true
body: <p>This may be quite a simple one. </p>
  
  <p>I have a DIV with the class <code>.banner-images</code> which usually contains <code>img</code>s. What I would like to do is change the height of its parent div, <code>#banner-wrapper</code> if the <code>.banner-images</code> is empty.</p>
  
  <p>This is what I have so far:</p>
  
  <pre><code>if ('.banner-image:empty') {
      $('#banner-wrapper').css({'height' : '210px'});
  };
  </code></pre>