title: Using em's in jQuery Script
body: <p>I'm working on a website and I'm trying to make every measurement to be in em's, but but the script I repurposed from an old project I can't seem to get working with em's, it only seems to work with pixels.</p>
  
  <pre><code>$(window).scroll(function(){
      $("#nav").css("top",Math.max(0,96-$(this).scrollTop()));
  });
  </code></pre>
  
  <p>Here's a demo of what it does:</p>
  
  <p><a href="http://jsfiddle.net/hwRSF/1/" rel="nofollow">http://jsfiddle.net/hwRSF/1/</a></p>
  
  <p>If anyone can help and show me what I need to do it would be greatly appreciated!</p>