function menuChange(zmienna, nr)
{
  if (zmienna=='Tak')
    document.getElementById('menuStrz'+nr).style.backgroundImage="url('img/top_strz_.jpg')";
  else
    document.getElementById('menuStrz'+nr).style.backgroundImage="url('img/top_strz.jpg')";
}

function ShowOrHide(id)
 {

  var item = null;
  if (document.getElementById) item = document.getElementById(id);
  else if (document.all) item = document.all[id];
  else if (document.layers) item = document.layers[id];
  if (!item){  }
   else if (item.style)
   {
    if (item.style.display == "none") item.style.display = "";
    else item.style.display = "none";
   }
   else
   {
    item.visibility = "show";
   }
}

function idz_do_strony(id, link) {
  advAJAX.get({
              url : link,
              onSuccess : function(obj) { document.getElementById(id).innerHTML = obj.responseText; }
            });
}