if (document.images) {
  image1on = new Image();
  image1on.src = "studio.jpg";
  image1off = new Image();
  image1off.src = "studio_low.jpg";
}
{
  image2on = new Image();
  image2on.src = "fotogalery.jpg";
  image2off = new Image();
  image2off.src = "fotogalery_low.jpg";
}
{
  image3on = new Image();
  image3on.src = "biogelvopros.jpg";
  image3off = new Image();
  image3off.src = "biogelvopros_low.jpg";
}
{
  image4on = new Image();
  image4on.src = "kontakt.jpg";
  image4off = new Image();
  image4off.src = "kontakt_low.jpg";
}
{
  image5on = new Image();
  image5on.src = "personal.jpg";
  image5off = new Image();
  image5off.src = "personal_low.jpg";
}
{
  image6on = new Image();
  image6on.src = "info.jpg";
  image6off = new Image();
  image6off.src = "info_low.jpg";
}
{
  image7on = new Image();
  image7on.src = "price.jpg";
  image7off = new Image();
  image7off.src = "price_low.jpg";
}
{
  image8on = new Image();
  image8on.src = "news.jpg";
  image8off = new Image();
  image8off.src = "news_low.jpg";
}
function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}