example

function sidebar_share_sticky() {

        var top = 20;
        var cachetop = top;
        var navbar = $('.jeg_navbar_wrapper');
        var ww = $(window).width();

        var do_sticky = function() {
            var st = $(window).scrollTop();

            // is navbar sticky
            if(st == 0) {
                if(navbar.position().top === 0) {
                    if ( st > navbar.outerHeight()) {
                        top = 70;
                    }
                }
            }

            if(ww >= 767 && cachetop !== top)
            {
                $('.jeg_sticky_sidebar').addClass('normalize-top');
                $('.share-float').addClass('normalize-top');
            }

        };

        $(window).bind('scroll', do_sticky);
        $(window).bind('resize', function(){
            ww = $(window).width();
        })
    }