function mapa(adr) 
{
	var w = 750;
	var h = 500;
	var win_x = Math.round((screen.width - w) / 2);
	var win_y = Math.round((screen.height - h) / 2);

	map = new Object;
	url = 'http://www.um.gliwice.pl/mapa/mapa.php4' + '?RUN=' + adr;
	map = open(url, "OKNO_MAPA", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0, height=" + h + ",width=" + w + ",top=" + win_y + ",left=" + win_x);
	map.focus();
}