jQuery(document).ready(function($) {
  var highlightCorrectNavigationSectionBasedOnLocation = function() {
    $('nav.getting-started-nav a').removeClass('active');
    $("nav.getting-started-nav a[data-section='" + window.location.hash + "']").addClass('active');
  };

  var smoothScrollTo = function(sectionId) {
    $('html, body').animate({
      scrollTop: $(sectionId).offset().top - 100
    }, 500, function() {
      window.location.hash = sectionId;
      highlightCorrectNavigationSectionBasedOnLocation();
    });
  };

  var setupSidebar = function() {
    $('nav.getting-started-nav ul.verticalnav > li.dropdown > a').click(function(e){
      e.preventDefault();
      var isOpen = $(this).parent().hasClass('open');
      $('nav.getting-started-nav ul.verticalnav > li.dropdown > ul').hide();
      $('nav.getting-started-nav ul.verticalnav > li.dropdown').removeClass('open');
      if(!isOpen) {
        $(this).parent().addClass('open');
        $(this).parent().find('ul').show();  
      }
    });
  };

  var stickySidebar = function() {
    $('nav.getting-started-nav').affix({
      offset: {
        top: function() {
          return (this.top = $('header').outerHeight(true))
        },
        bottom: function () {
          return (this.bottom = $('footer').outerHeight(true))
        }
      }
    });
  };

  var setupSmoothScrollForSamePageLinks = function() {
    $("body").on("click", "a[href^='#'][href!='#'], a[data-dest]", function(evt) {
      var currentPage = window.location.pathname.replace(/\/$/, '');
      var section = $(this).data('section') || $.attr(this, 'href');
      var dest = $(this).data('dest') || currentPage;
      var targetIsInSamePage = $(this).data('is-local') === true;

      if (targetIsInSamePage) {
        smoothScrollTo(section);
      } else {
        window.location.href = dest + section;
      }
      evt.preventDefault();
    });
  };

  setupSidebar();
  setupSmoothScrollForSamePageLinks();
  highlightCorrectNavigationSectionBasedOnLocation();

  enquire.register("screen and (min-width: 992px) and (min-height: 600px)", {
    match : function() {
      stickySidebar();
    },  

  });
});

@@ -680,22 +680,22 @@
     var 
-isOp
+par
 en
+t
  = $(thi
@@ -705,16 +705,43 @@
 parent()
+;%0A      var isOpen = parent
 .hasClas
@@ -751,24 +751,25 @@
 open');%0A
+%0A
       $(
 'nav.get
@@ -764,140 +764,45 @@
   $(
-'nav.getting-started-nav ul.verticalnav %3E li.dropdown %3E ul').hide();%0A      $('nav.getting-started-nav ul.verticalnav %3E li.dropdown')
+this).next('ul').hide();%0A      parent
 .rem
@@ -847,32 +847,22 @@
         
-$(this).
 parent
-()
 .addClas
@@ -880,32 +880,22 @@
         
-$(this).
 parent
-()
 .find('u
@@ -905,18 +905,16 @@
 .show();
-  
 %0A      %7D

Allow multiple sections of the introduction to GoCD dropdown to be open at the same time. This allows people to see all the contents/concepts at once if they would like.