window.name = 'glowne';
var popup;
function large_photo( url, width, height ) {
  var img_left = ( screen.width - width ) /2;
  var img_top = ( screen.height - height ) /2;
  popup = window.open( url, 'okno','width=' + width + ',height=' + height + ',scrollbars=no,resizable=no,menubar=no,copyhistory=no,left=' + img_left + ',top=' + img_top );
  popup.focus();
}
window.onunload = function okno_close() {
  if ( popup ) {
    window.popup.close();
  }
}