function preloadImages() {
  if (navigator.appVersion.indexOf("2.") != -1){
    check = false;
    }
  if ((navigator.appVersion.indexOf("3.") != -1) && (navigator.appName.indexOf("Explorer") != -1)){
    check = false;
    }
  else {
    check = true;
    }
  if (check == true){

    onas = new Image();
    onas.src = "site_img/menu_onas0.jpg";
    onason = new Image();
    onason.src = "site_img/menu_onas1.jpg";
    onasstay = new Image();
    onasstay.src = "site_img/menu_onas1.jpg";

    hot = new Image();
    hot.src = "site_img/menu_hot0.jpg";
    hoton = new Image();
    hoton.src = "site_img/menu_hot1.jpg";
    hotstay = new Image();
    hotstay.src = "site_img/menu_hot1.jpg";

    szuf = new Image();
    szuf.src = "site_img/menu_szuf0.jpg";
    szufon = new Image();
    szufon.src = "site_img/menu_szuf1.jpg";
    szufstay = new Image();
    szufstay.src = "site_img/menu_szuf1.jpg";

    prasa = new Image();
    prasa.src = "site_img/menu_prasa0.jpg";
    prasaon = new Image();
    prasaon.src = "site_img/menu_prasa1.jpg";
    prasastay = new Image();
    prasastay.src = "site_img/menu_prasa1.jpg";

    krotko = new Image();
    krotko.src = "site_img/menu_krotko0.jpg";
    krotkoon = new Image();
    krotkoon.src = "site_img/menu_krotko1.jpg";
    krotkostay = new Image();
    krotkostay.src = "site_img/menu_krotko1.jpg";

    arch = new Image();
    arch.src = "site_img/menu_arch0.jpg";
    archon = new Image();
    archon.src = "site_img/menu_arch1.jpg";
    archstay = new Image();
    archstay.src = "site_img/menu_arch1.jpg";

    forum = new Image();
    forum.src = "site_img/menu_forum0.jpg";
    forumon = new Image();
    forumon.src = "site_img/menu_forum1.jpg";
    forumstay = new Image();
    forumstay.src = "site_img/menu_forum1.jpg";

    kont = new Image();
    kont.src = "site_img/menu_kont0.jpg";
    konton = new Image();
    konton.src = "site_img/menu_kont1.jpg";
    kontstay = new Image();
    kontstay.src = "site_img/menu_kont1.jpg";

    ank = new Image();
    ank.src = "site_img/menu_ank0.jpg";
    ankon = new Image();
    ankon.src = "site_img/menu_ank1.jpg";
    ankstay = new Image();
    ankstay.src = "site_img/menu_ank1.jpg";

    linki = new Image();
    linki.src = "site_img/menu_linki0.jpg";
    linkion = new Image();
    linkion.src = "site_img/menu_linki1.jpg";
    linkistay = new Image();
    linkistay.src = "site_img/menu_linki1.jpg";

    loguj = new Image();
    loguj.src = "site_img/menu_loguj0.jpg";
    logujon = new Image();
    logujon.src = "site_img/menu_loguj1.jpg";
    logujstay = new Image();
    logujstay.src = "site_img/menu_loguj1.jpg";

    profil = new Image();
    profil.src = "site_img/menu_profil0.jpg";
    profilon = new Image();
    profilon.src = "site_img/menu_profil1.jpg";
    profilstay = new Image();
    profilstay.src = "site_img/menu_profil1.jpg";

    szukaj = new Image();
    szukaj.src = "site_img/szukaj0.jpg";
    szukajon = new Image();
    szukajon.src = "site_img/szukaj1.jpg";

    footer_forum = new Image();
    footer_forum.src = "site_img/dol_forum0.jpg";
    footer_forumon = new Image();
    footer_forumon.src = "site_img/dol_forum1.jpg";
    footer_forumstay = new Image();
    footer_forumstay.src = "site_img/dol_forum1.jpg";

    footer_main = new Image();
    footer_main.src = "site_img/dol_main0.jpg";
    footer_mainon = new Image();
    footer_mainon.src = "site_img/dol_main1.jpg";
    footer_mainstay = new Image();
    footer_mainstay.src = "site_img/dol_main1.jpg";

    footer_contact = new Image();
    footer_contact.src = "site_img/dol_kont0.jpg";
    footer_contacton = new Image();
    footer_contacton.src = "site_img/dol_kont1.jpg";
    footer_contactstay = new Image();
    footer_contactstay.src = "site_img/dol_kont1.jpg";

    footer_back = new Image();
    footer_back.src = "site_img/dol_back0.jpg";
    footer_backon = new Image();
    footer_backon.src = "site_img/dol_back1.jpg";
    footer_backstay = new Image();
    footer_backstay.src = "site_img/dol_back1.jpg";
  }
}

//cookie_name = "buttonClicked";
//var imageStay;

//imageStay = getCookie();
//imageStay="";

function putCookie(name) {
  if(document.cookie != document.cookie) {
    index = document.cookie.indexOf(cookie_name);}
  else {
    index = -1;}
  if (index == -1) {
    document.cookie=cookie_name+"="+name+"; expires=Monday, 04-Apr-2010 05:00:00 GMT";
  }
}

function putCookieVal(name,value) {
  if(document.cookie != document.cookie) {
    index = document.cookie.indexOf(name);}
  else {
    index = -1;}
  if (index == -1) {
    document.cookie=name+"="+value+"; expires=Monday, 04-Apr-2010 05:00:00 GMT";
  }
}

function getCookie() {
  if(document.cookie) {
    index = document.cookie.indexOf(cookie_name);
    if (index != -1) {
      namestart = (document.cookie.indexOf("=", index) + 1);
      nameend = document.cookie.indexOf(";", index);
      if (nameend == -1) {
        nameend = document.cookie.length;
      }
      buttonName = document.cookie.substring(namestart, nameend);
      return buttonName;
    }
    else {
      return "";
    }
  }
  else {
    return "";
  }
}

function imageon(name){
  if (imageStay != name){
          document[name].src = eval(name + "on.src");
  }
}
function imageoff(name){
  if (imageStay != name){
          document[name].src = eval(name + ".src");
  }
}

function on(name){
        if (check == true){
  imageon(name);
  }
}
function off(name){
        if (check == true){
  imageoff(name);
  }
}

function stay(name){
  if (check == true){
    document[name].src = eval(name + "stay.src");
    if (imageStay != name) {
      if (typeof(imageStay) != 'undefined' && imageStay != ""){
        document[imageStay].src = eval(imageStay + ".src");
      }
    }
    //imageStay = name;
    putCookie(name);
  }
}

function ShowSurvey(id) {
  width='350';
  height='270';
  config='left=50,top=50,width='+width+',height='+height+',innerheight='+width+',innerwidth='+height+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=auto,resizable=yes';
  galeria=window.open('survey.php?view='+id,'survey',config);
};

function findPosX(obj) {
  var curleft = 0;
  if (obj.offsetParent)
  {
    while (obj.offsetParent)
    {
      curleft += obj.offsetLeft
      obj = obj.offsetParent;
    }
  }
  else if (obj.x)
    curleft += obj.x;
  return curleft;
}

function findPosY(obj) {
  var curtop = 0;
  if (obj.offsetParent)
  {
    while (obj.offsetParent)
    {
      curtop += obj.offsetTop
      obj = obj.offsetParent;
    }
  }
  else if (obj.y)
    curtop += obj.y;
  return curtop;
}