https://www.scooterspot.nl/Files/3/4000/4574/Protom/223253/Media/scrolling-nav.js

1//jQuery to collapse the navbar on scroll
2$(window).scroll(function() {
3    if ($(".navbar").offset().top > 50) {
4        $(".navbar-fixed-top").addClass("top-nav-collapse");
5    } else {
6        $(".navbar-fixed-top").removeClass("top-nav-collapse");
7    }
8});
9
10
11$(window).scroll(function() {
12    if ($(".navbar").offset().top > 50) {
13        $(".navbar-show-all").addClass("navbar-show-all-new");
14     } else {
15        $(".navbar-show-all").removeClass("navbar-show-all-new");
16     }
17});
18
19
20//jQuery for page scrolling feature - requires jQuery Easing plugin
21$(function() {
22    $('a.page-scroll').bind('click', function(event) {
23        var $anchor = $(this);
24        $('html, body').stop().animate({
25            scrollTop: $($anchor.attr('href')).offset().top
26        }, 1500, 'easeInOutExpo');
27        event.preventDefault();
28    });
29    
30     
31    
32});