title: how to check if div is empty and make disappear?
body: <p>What i have is sometimes on ym page a div could be empty and it takes up empty space.
  So i want to be able to hide it of make the width small if it is empty..</p>
  
  <p>this is the html...</p>
  
  <pre><code>&lt;div class="four columns"&gt;
          &lt;div class="inner-column" style="height:500px;overflow: auto;"&gt;            
               &lt;ul class="SubMenu"&gt;
              &lt;/ul&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  </code></pre>
  
  <p>this is the jquery i am trying...</p>
  
  <pre><code>if ($('.four columns').is(":empty")) {
              $('.four').css('width','15px');
          }
  </code></pre>
  
  <p>whats should it be?</p>
  
  <p>example:http://jsfiddle.net/uzi002/yad9Q/6/</p>