function na_preload_img()
{
  var img_list = na_preload_img.arguments;
  if (document.preloadlist == null)
    document.preloadlist = new Array();
  var top = document.preloadlist.length;
  for (var i=0; i < img_list.length-1; i++) {
    document.preloadlist[top+i] = new Image;
    document.preloadlist[top+i].src = img_list[i+1];
  }
}
function pokaz_foto_big(src_foto, podpis) {
         if (document.getElementById("id_big") != null) {
            document.getElementById("id_big").src=src_foto;
         }
         if (document.getElementById("podpis") != null) {
            document.getElementById("podpis").innerHTML=podpis;
         }

}