$(function() {

  $('#gallery_content_stack').children(':not(:first-child)').hide();

  $('#gallery_nav_bar').children('li').bind('click', function() {
    if ($(this).hasClass('selected')) return;

    $(this).siblings().removeClass('selected');
    $(this).addClass('selected');

    var index = $(this).parent().children().index(this);

    var current_selection = $("#gallery_content_stack").children(':animated').stop(true, true);

    var current_selection = $("#gallery_content_stack").children(":visible");
    var newSelection = $("#gallery_content_stack").children(":eq("+ index + ")");

    current_selection.fadeOut("fast", function() {
      newSelection.fadeIn("fast");
    });
  });
});