    <footer class="mdl-mini-footer">
      <div class="mdl-mini-footer__left-section">
        <div class="mdl-logo">&copy; 2016 Google, Inc.</div>
      </div>
      <div class="mdl-mini-footer__right-section">
        <a class="mdl-button mdl-js-button mdl-js-ripple-effect" href="#"
          id="scroll-to-top">
          Back to Top
        </a>
      </div>
    </footer>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
    <script>
      var shiftWindow = function() {
        if (location.hash.length !== 0) {
          window.scrollBy(0, -50);
        }
      };
      window.addEventListener("hashchange", shiftWindow);

      var highlightCurrentSidebarNav = function() {
        var href = location.pathname;
        var item = $('.drawer-nav [href$="' + href + '"]');
        if (item) {
          var li = item.parent();
          li.addClass("active");
        }
      };

      /**
       * Creates a CSE search form and submits the search query.
       *
       * Since the Material Design Lite header expandable text field does not
       * support having a <form> element around the <input> element, we need to
       * capture the ENTER keypress and then submit the form using this handler.
       */
      var submitSearch = function(query) {
        var form = document.createElement("form");
        form.setAttribute("action", "/search.html");

        var cseParams = {
          "cx": "008327220137350982602:0mpaowwcmvg",
          "cof": "FORID:10",
          "ie": "UTF-8",
        };
        for (key in cseParams) {
          var hidden = document.createElement("input");
          hidden.setAttribute("type", "hidden");
          hidden.setAttribute("name", key);
          hidden.setAttribute("value", cseParams[key]);
          form.appendChild(hidden);
        }

        var text = document.createElement("input");
        text.setAttribute("type", "text");
        text.setAttribute("name", "q");
        text.setAttribute("value", query);
        form.appendChild(text);

        document.body.appendChild(form);
        form.submit();
      };

      $(document).ready(function() {
        // Scroll to anchor of location hash, adjusted for fixed navbar.
        window.setTimeout(function() {
          shiftWindow();
        }, 1);

        // Highlight the current item on the sidebar.
        highlightCurrentSidebarNav();

        // Handler to capture the ENTER keypress for the CSE search input
        // in the page header and then call submitSearch() to submit the search
        // query.
        $("#cse-search-box").keyup(function(e) {
          if (e.keyCode == 13) {
            let query = $("#cse-search-box").val();
            submitSearch(query);
          }
        });

        // Handler for the Scroll to Top link in the page footer to scroll the
        // main content back to the top.
        $("#scroll-to-top").click(function() {
          $(".mdl-layout__content").animate({ scrollTop: 0 }, "slow");
          return false;
        });
      });
    </script>

    <!-- Google Analytics tracking code -->
    <script>
      (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
      (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
      m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
      })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

      ga('create', 'UA-61082125-2', 'auto');
      ga('send', 'pageview');
    </script>