title: css difficulties with 100% height
body: <p>I'm trying to create a page with a panel on the left side.  The panel has a header, a content area and a footer.  The main panel wrapper div is supposed to be 100% of the height of the page.  The header and footer do not have a specified height because I only want them to be large enough for their text and padding while the center content area I want to be 100% of the container minus whatever the height of the header and footer is.  I'm not sure how or if I can do this in css.  Anyone know what to do here?  Thanks.</p>
  
  <p>The html page &amp; css is here - <a href="https://gist.github.com/1641918" rel="nofollow">https://gist.github.com/1641918</a></p>