var activeItem;
var lastMenu;
var allowDownChange;
lastMenu = 0;
allowDownChange=1;

function ShowMenu(id)
{

// neni zmena
if (lastMenu==id) { return; }
// neni povoleno zobrazit nizsi polozku (ochrana pred nechtenym onmouseover efektem)
// if ((allowDownChange==0)&&(id>lastMenu)) { return; }

if (document.all) {
   var e1 = document.all['menu_content_' + id];
   //var e2 = document.all['IM' + id];
   var l1 = document.all['menu_content_' + lastMenu];
   //var l2 = document.all['IM' + lastMenu];
   }
else {
   var e1 = document.getElementById('menu_content_' + id);
   //var e2 = document.getElementById('IM' + id);
   var l1 = document.getElementById('menu_content_' + lastMenu);
   //var l2 = document.getElementById('IM' + lastMenu);
}

    if (!e1) { return; }
    
	if ((lastMenu != 0)&&(lastMenu !=id))
		{
		try {		
		    l1.style.display = 'none'; 
		} catch(e) { }
		//if (l2) l2.src = 'imageso/arrow.gif'; 
		}

	if (e1.style.display == '')
		{ 
		e1.style.display = 'none'; 
		//if (e2) e2.src = 'imageso/arrow.gif'; 
		}
	 else
		{ 
		e1.style.display = ''; 
		//if (e2) e2.src = 'imageso/arrowE.gif'; 
		}
	lastMenu = id;
	allowDownChange = 0;
}

function imgShow(FilePath)
{
	var win;	
	win = window.open('popup.htm?'+FilePath,'NulkPopup','height=10,width=300,scrollbars=yes,resizable=yes,titlebar=no,toolbar=no') ;
}