function show(nrmenu, element)
{
if (nrmenu!=null) {
	eval("document.all.menu"+nrmenu+".style.visibility=\"visible\";");
}

if (element!=null) {
	element.style.background='#FEFBFA';
	}


} 

function hide(nrmenu, element)
{
if (nrmenu!=null) {
	eval("document.all.menu"+nrmenu+".style.visibility=\"hidden\";");
}

if (element!=null) {
	element.style.background='#9BC0E5';
	}
} 


function pokazObraz(adres,x,y)
	{
  	var left = Math.floor( (screen.width - x) / 2);
   	var top = Math.floor( (screen.height - y) / 2);
	var win= window.open(adres,'','top=' + top + ',left=' + left +',scrollbars=no,menubar=no,height='+y+',width='+x+',resizable=no,toolbar=no,location=no,status=no');
	//if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
	//return win;
	}