//Show layer//
function showLayer(layerName){

	obj = document.getElementById(layerName);
	obj.style.visibility="visible";

}

//Hide layer//
function hideLayer(layerName){

	obj = document.getElementById(layerName);
	obj.style.visibility="hidden";

}

//MENU//
  function rozwin(rid)
  {
    current=(document.getElementById(rid).style.display == 'none') ? 'block' : 'none';
    document.getElementById(rid).style.display = current;
  }