ns = (document.layers)? true:false
ie = (document.all)? true:false
function showObject(obj) 
{
	if (ns) document.layers[obj].visibility = "show"
	else if (ie) document.all[obj].style.visibility = "visible"
}

function hideObject(obj) 
{
	if (ns) document.layers[obj].visibility = "hide"
	else if (ie) document.all[obj].style.visibility = "hidden"
}

function centerObject(obj, wsp_x, wsp_y)
{
	if (ns) {
	document.layers[obj].visibility = "show";
	document.layers[obj].left = (parseInt(document.width)  / 2) + parseInt(wsp_x);
	document.layers[obj].top  = (parseInt(document.height)  / 2) + parseInt(wsp_y);
	}
	else if (ie) {
	document.all[obj].style.visibility = "visible";
	document.all[obj].style.left = (parseInt(document.body.scrollWidth) / 2) + parseInt(wsp_x);
	document.all[obj].style.top  = (parseInt(document.body.scrollHeight) / 2) + parseInt(wsp_y);
	}
}

//--- obsluga zdarzenie 'onResize' w NS
if(ns)
{
	window.captureEvents(Event.RESIZE);
	window.onresize = ns_resize;
}

function ns_resize(evnt)
{  
    window.location.reload(); 
}

//--- obsluga zdarzenie 'onResize' w IE
if(ie)
  window.onresize = ie_resize;
function ie_resize()
{
  location.reload(false);
}