gistfile1.txt

<script type="text/javascript">
   //you can wrap this in a click function or some other event.
   $("#content_to_hide").hide();

</script>

<!-- content you don't want to hide in css of the wrapper, 
     set height,width,& bg on this element -->
<div id="content_wrapper">
    <!--  content you want to hide -->
    <div id="content_to_hide"> </div>
</div>