// JavaScript Document
// preloading images
  uvodpic = new Image();
  uvodpic.src = "img/uvod.gif";
  uvodpic_over = new Image();
  uvodpic_over.src = "img/uvod_over.gif";
  uvodpic_down = new Image();
  uvodpic_down.src = "img/uvod_down.gif";
  
  realitypic = new Image();
  realitypic.src = "img/reality.gif";
  realitypic_over = new Image();
  realitypic_over.src = "img/reality_over.gif";
  realitypic_down = new Image();
  realitypic_down.src = "img/reality_down.gif";
  
  kontaktpic = new Image();
  kontaktpic.src = "img/kontakt.gif";
  kontaktpic_over = new Image();
  kontaktpic_over.src = "img/kontakt_over.gif";
  kontaktpic_down = new Image();
  kontaktpic_down.src = "img/kontakt_down.gif";

  infopic = new Image();
  infopic.src = "img/info.gif";
  infopic_over = new Image();
  infopic_over.src = "img/info_over.gif";
  infopic_down = new Image();
  infopic_down.src = "img/info_down.gif";
  
  left_over = new Image();
  left_over.src = "img/page_left_over.gif";
  right_over = new Image();
  right_over.src = "img/page_right_over.gif";
  
// menu 
  function setMenuTitle(text) {
    document.getElementById('menu_title').innerHTML = text;
  }