function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    main_11 = newImage("/gfx_horny/main_11.jpg");
    main_12 = newImage("/gfx_horny/main_12.jpg");
    main_13 = newImage("/gfx_horny/main_13.jpg");
    main_31 = newImage("/gfx_horny/main_31.jpg");
    main_41 = newImage("/gfx_horny/main_41.jpg");
    bt01_over = newImage("/gfx_horny/1ekookno.jpg");
    bt01_out = newImage("/gfx_horny/0ekookno.jpg");
    bt02_over = newImage("/gfx_horny/1produkty.jpg");
    bt02_out = newImage("/gfx_horny/0produkty.jpg");
    bt03_over = newImage("/gfx_horny/1kontakt.jpg");
    bt03_out = newImage("/gfx_horny/0kontakt.jpg");
    btpvc_over = newImage("/gfx/1pvc.jpg");
    btpvc_out = newImage("/gfx/0pvc.jpg");
    btdrevo_over = newImage("/gfx/1drevo.jpg");
    btdrevo_out = newImage("/gfx/0drevo.jpg");
    btweb_over = newImage("/gfx_horny/1webdesign.jpg");
    btweb_out = newImage("/gfx_horny/0webdesign.jpg");
    preloadFlag = true;
  }
}