title: Bootstrap, making responsive changes to layout
body: <p>I'm using a fluid Twitter Bootstrap layout for my design and am about to make it responsive. Consider a grid such as this:</p>
  
  <pre><code>&lt;div class="row-fluid"&gt;
      &lt;div class="span4"&gt;&lt;/div&gt;
      &lt;div class="span8"&gt;&lt;/div&gt;    
  &lt;/div&gt;
  </code></pre>
  
  <p>What is the best way to hide span4 and let span8 take up the entire width, to be used when the screen gets smaller?</p>