[xelawho]

I think you forgot the javascript

<script>
$(function() {
    $("#related-btn").hover(function() {
      if(!$(this).data('pinned'))
        $("#show-hide").toggle("slow");
    });
    $("#related-btn").click(function() {
      $(this).data('pinned', !$(this).data('pinned'));
    });
});
</script>