browserVer = parseInt(navigator.appVersion);
   if (browserVer >= 3) version = "n3";
   else version = "n2"

   if (version == "n3") {

   produktyp = new Image();
   produktyp.src = "img/menu/produkty-b.gif";
   produktya = new Image();
   produktya.src = "img/menu/produkty-a.gif";

   kontp = new Image();
   kontp.src = "img/menu/kont-b.gif";
   konta = new Image();
   konta.src = "img/menu/kont-a.gif";

   newsp = new Image();
   newsp.src = "img/menu/news-b.gif";
   newsa = new Image();
   newsa.src = "img/menu/news-a.gif";


}
function act(imgName)  {
   if (version == "n3")   {
   imgOn = eval(imgName + "a.src");
   document [imgName].src = imgOn;
   }
}

function pas(imgName)   {
   if (version == "n3") {
   imgOff = eval(imgName + "p.src");
   document [imgName].src = imgOff;
   }
}