Keyboard-navigation problem

Keyboard-navigation problem

Hello! Hope you're fine! First I will excuse for my bad english. Have some problem with a keyboard-scroll-script. I don't know what I'm doing wrong. I want it to work like this (link1), press "UP" and "DOWN"-arrows to test. But right now it doesn't work here (link2). I have made a script who set the height and width to 100% of the screen. Then I have a script which will listen for keyboard-press of "UP" and "DOWN" key, and then scroll from section, to section (class: keyboardscroll). But it doesn't work on the second link (link2). Someone who know why? Or can help me fix this working? If I forgot to explain something, please tell me!
Thanks for all kind of help!

Script for resizing to 100% sections:

  2. $(document).ready(function() {

  4. $(window).resize(function() {

  6. Resize();

  8. });

  10. var Resize = function() {

  12. var windowHeight = $(window).height(),
  13. windowWidth = $(window).width();
  15. $("section").css("width", windowWidth);
  16. $("section").css("height", windowHeight);

  18. }

  20. $(window).resize(function() {

  22. Resize();

  24. });

  26. setTimeout(Resize, 20);
  27. Scrolling();

  29. });
Script for keyboard-scroll:

  2. $(window).load(function(){
  3. $(function() {
  4.     var boxLefts = [];
  5.     $('div.keyboardscroll').each(function(i, el){
  6.         boxLefts.push(this.offsetTop);
  7.     });
  8.     
  9.     $(document).keydown(function(e) {
  10.         var dir = false,
  11.             targetTop = -1;
  12.         
  13.         switch (e.keyCode) {
  14.         case 38:
  15.             dir = -1;
  16.             break;                
  17.         case 40:
  18.             dir = 1;
  19.             break;
  20.         default:
  21.             break;
  22.         }

  24.         if (dir) {
  25.             e.preventDefault();
  26.             winDown = window.scrollY;
  27.             $.each(boxLefts, function(i, v){
  28.                 if ((dir == 1 && winDown < v && targetTop < 0) ||
  29.                     (dir == -1 && winDown > v)) {
  30.                     targetTop = v;
  31.                 }
  32.             });
  33.             if (targetTop >= 0) {
  34.                 $('html, body').animate({scrollTop: targetTop}, 200);
  35.             }
  36.         }
  37.     });
  38. });
  39. });

Have a nice day!

Sincerly,
J