diff --git a/website/assets/script.js b/website/assets/script.js
new file mode 100644
index 0000000..69c4906
--- /dev/null
+++ b/website/assets/script.js
@@ -0,0 +1,11 @@
+document.addEventListener('DOMContentLoaded', function() {
+  var menuItems = document.querySelector('.menu-items');
+  menuItems.addEventListener('click', function(event) {
+    if (event.target.tagName === 'SPAN') {
+      var checkboxes = document.querySelectorAll('#toggle-menu');
+      checkboxes.forEach(function(checkbox) {
+        checkbox.checked = false;
+      });
+    }
+  });
+});
diff --git a/website/modify_build.rb b/website/modify_build.rb
index 2afe660..b50a203 100644
--- a/website/modify_build.rb
+++ b/website/modify_build.rb
@@ -40,6 +40,7 @@ class ModifyBuild
     text = remove_section_table_of_contents(text)
     text = mark_menu_as_selected_if_on_page(text, extract_file_from_path(filename))
     text = add_canonical_for_duplicates(text, extract_file_from_path(filename))
+    text = include_javascript(text)
     File.open(filename, "w") {|file| file.puts text }
   end
 
@@ -367,6 +368,16 @@ class ModifyBuild
     doc.to_html
   end
 
+  def include_javascript(text)
+    doc = build_doc(text)
+    head = doc.css("head")[0]
+    js_tag_html = %Q{
+      <script type="text/javascript" src="script.js"></script>
+    }
+    head.inner_html = "#{head.inner_html} #{js_tag_html}"
+    doc.to_html
+  end
+
   def build_doc(text)
     Nokogiri::HTML(text)
   end