$(document).ready(
     function() {
        $("table.kategoriak  td a img").mouseenter(
           function() {
             var str = $(this).attr('src');
             ($(this).attr('src', str.replace(/_kek.jpg/, '.jpg') )); 
           }
        );
        $("table.kategoriak  td a img").mouseleave(
           function() {
             var str = $(this).attr('src');
             if (str.indexOf('_kek.jpg') == -1){
               ($(this).attr('src', str.replace(/.jpg/, '_kek.jpg') )); 
            }
           }
        );
     setInterval('step()', 80);
    }
  );

  function onout(id){
    ieid = document.getElementById(id);
    id.style.display = 'none';
  }

  function onover(id){
    ieid = document.getElementById(id);
    id.style.display = 'block';
  }

  var cloudx=0;
  var cloudy=0;

  function step(){
    var iescroll = document.getElementById('scroll'); 
    /*
    cloudx--;
    cloudy += 0.5;
    iescroll.style.backgroundPosition = Math.floor(cloudx)+'px '+Math.floor(cloudy)+'px';
    */
    cloudx -= 2;
    cloudy++;
    iescroll.style.backgroundPosition = cloudx+'px '+cloudy+'px';
  }