function obr(jaki,szer,wys,tytul,tresc) {
tresc = (tresc == 'undefined') ? '' : tresc;
var popup=window.open('about:blank', 'nazwaokna','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,fullscreen=no,channelmode=no,width='+szer+',height='+wys+',left='+(screen.width-szer)/2+',top='+(screen.height-wys)/2);
with(popup.document) {
open();
write(''+tytul+ '
' +tresc+ '');
close();
}
}