browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion); 

if (browserName == "Netscape" && browserVer >= 3) version="ok";
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) version="ok";
else version="ok"; 

if (version == "ok") { 

m1 = new Image();
m1.src = "images/menu_oferta.jpg";
m1_on = new Image();
m1_on.src = "images/menu_oferta_on.jpg";

m2 = new Image();
m2.src = "images/menu_chrzciny.jpg";
m2_on = new Image();
m2_on.src = "images/menu_chrzciny_on.jpg";

m3 = new Image();
m3.src = "images/menu_18stki.jpg";
m3_on = new Image();
m3_on.src = "images/menu_18stki_on.jpg";

m4 = new Image();
m4.src = "images/menu_studniowki.jpg";
m4_on = new Image();
m4_on.src = "images/menu_studniowki_on.jpg";

m5 = new Image();
m5.src = "images/menu_wesela.jpg";
m5_on = new Image();
m5_on.src = "images/menu_wesela_on.jpg";

m6 = new Image();
m6.src = "images/menu_jubileusze.jpg";
m6_on = new Image();
m6_on.src = "images/menu_jubileusze_on.jpg";

m7 = new Image();
m7.src = "images/menu_i_integracyjne.jpg";
m7_on = new Image();
m7_on.src = "images/menu_i_integracyjne_on.jpg";

m8 = new Image();
m8.src = "images/menu_pusta.jpg";
m8_on = new Image();
m8_on.src = "images/menu_pusta_on.jpg";

m9 = new Image();
m9.src = "images/bt_stare_konie.jpg";
m9_on = new Image();
m9_on.src = "images/bt_stare_konie_on.jpg";

m10 = new Image();
m10.src = "images/bt_bar.jpg";
m10_on = new Image();
m10_on.src = "images/bt_bar_on.jpg";


m11 = new Image();
m11.src = "images/bt_muzyka.jpg";
m11_on = new Image();
m11_on.src = "images/bt_muzyka_on.jpg";

m12 = new Image();
m12.src = "images/bt_kontakt.jpg";
m12_on = new Image();
m12_on.src = "images/bt_kontakt_on.jpg";

m13 = new Image();
m13.src = "images/bt_lokalizacja.jpg";
m13_on = new Image();
m13_on.src = "images/bt_lokalizacja_on.jpg";

m14 = new Image();
m14.src = "images/bt_kkjk.jpg";
m14_on = new Image();
m14_on.src = "images/bt_kkjk_on.jpg";


} 

function img_over(obrazek) {
if (version == "ok") {
document[obrazek].src = eval(obrazek + "_on.src");
}
} 

function img_out(obrazek) {
if (version == "ok") {
document[obrazek].src = eval(obrazek + ".src");
}
} 

//Preload buttonów podmiany
function preload() {
  if (!document.images) return;
  var ar = new Array();
  var arguments = preload.arguments;
  for (var i = 0; i < arguments.length; i++) {
    ar[i] = new Image();
    ar[i].src = arguments[i];
  }
}