ck_to_top.removeClass('cd-is-visible cd-fade-out'); if( $(this).scrollTop() > offset_opacity ) { $back_to_top.addClass('cd-fade-out'); } }); //smooth scroll to top $back_to_top.on('click', function(event){ event.preventDefault(); $('body,html').animate({ scrollTop: 0 , }, scroll_top_duration ); }); }); EPIC Course Listing Loading...