jQuery(function ($) { $.scrollIt({ upKey: 38, // key code to navigate to the next section downKey: 40, // key code to navigate to the previous section easing: 'linear', // the easing function for animation scrollTime: 600, // how long (in ms) the animation takes activeClass: 'is-active-top-nav__1level', // class given to the active nav element onPageChange: null, // function(pageIndex) that is called when page is changed topOffset: -63 // offset (in px) for fixed top navigation }); });