// The Slider is loaded like this:

      jQuery(window).load(function() {
        jQuery('.flexslider').flexslider({
            animation: "slide",
            directionNav: false,
              controlNav:false,
              keyboardNav:false,
              direction: "horizontal",
              slideshowSpeed:3000,
              animationSpeed:600,
              randomize: false
            });
      });

// This is how I change:

    function changeSection(section) {
        if(activeSection != section) {
            $('#'+activeSection).fadeToggle("slow");
            $('#'+section).delay(500).fadeToggle("slow");

            $('#menu-'+activeSection).removeClass('active');
            $('#menu-'+section).addClass('active');

            document.title = activeSectionTitle;
            history.pushState({}, '', section);

            activeSection = section;
        }
    }