noweOkienko = false;
function okno2(nurla, w, h){
  if(window.screen){
    aw=screen.availWidth;
    ah=screen.availHeight;
  } else {
    aw=640;
    ah=480;
  }
	w=530;
	h=390;
	if (noweOkienko) noweOkienko.close();
	noweOkienko = window.open("popup.php","Info","toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizeable=no, left=" + (aw-w)/2 + ", top=" + (ah-h)/2 + "," + "screenX=" + (aw-w)/2 + "," + "screenY= " + (ah-h)/2 + ", width="+w+", height="+h);
  noweOkienko.focus();
}

okno2(1,1,1);