popOkienko = null;
function pop(src, w, h)
	{
		if(window.screen){aw=screen.availWidth;ah=screen.availHeight;}else{aw=640;ah=450;}
		if(popOkienko==null || popOkienko.closed)
			{
				ustawienia="left=" + (aw-w)/2 + ",top=" + (ah-h)/2 + ",screenX=" + (aw-w)/2 + ",screenY=" + (ah-h)/2 + ",width=" + w + ",height=" + h + ",innerWidth=" + w + ",innerHeight=" + h + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no";
				popOkienko = window.open(src,'foobar',ustawienia);
			}
		else
			{
				popOkienko.location=src;
			}
		popOkienko.focus();
	}