//makes dynamic layer
function PgetStyleObject(objectId) {
  // checkW3C DOM, then MSIE 4, then NN 4.
  //
  if(document.getElementById && document.getElementById(objectId)) {
	return document.getElementById(objectId).style;
   }
   else if (document.all && document.all(objectId)) {
	return document.all(objectId).style;
   }
   else if (document.layers && document.layers[objectId]) {
	return document.layers[objectId];
   } else {
	return false;
   }
}
function PgetStatusObject(objectId) {
  // checkW3C DOM, then MSIE 4, then NN 4.
  //
  if(document.getElementById && document.getElementById(objectId)) {
	return document.getElementById(objectId);
   }
   else if (document.all && document.all(objectId)) {
	return document.all(objectId);
   }
   else if (document.layers && document.layers[objectId]) {
	return document.layers[objectId];
   } else {
	return false;
   }
}
function PchangeObjectVisibility(objectId, newVisibility) {
    // first get the object's stylesheet
    var styleObject = PgetStyleObject(objectId);

    // then if we find a stylesheet, set its visibility
    // as requested
    //
    if (styleObject) {
	styleObject.display = newVisibility;
	return true;
	}
	else
	{
	return false;
    }
}

function PokazDane(id)
{
	PchangeObjectVisibility(id,"block");
}

function UkryjDane(id)
{
     PchangeObjectVisibility(id,"none");
}


function navigacja(obj)
{
	UkryjDane("nav1");
	UkryjDane("nav2");
	UkryjDane("nav3");
	UkryjDane("nav4");
	UkryjDane("nav5");
	UkryjDane("nav6");
	UkryjDane("nav7");
	PokazDane(obj);
}