Sticky navigation using jquery (sticky after viewport is overhead...)

Sticky navigation

$(document).ready(function () {
                var aboveHeight = $('#topContainer').outerHeight();
                $(window).scroll(function () {
                    if ($(window).scrollTop() > aboveHeight) {
                        $('#menu').addClass('fixed').css('top', '0').next()
                            .css('padding-top', '50px');
                    } else {
                        $('#menu').removeClass('fixed').next()
                            .css('padding-top', '0');
                    }
                });
            });