function zeigeEvent(link)
{
  var eventFenster;

  var sollHoehe = 550;
  var sollBreite = 520;
  var links = (screen.width - sollBreite) / 2;
  var oben = (screen.height - sollHoehe) / 3;

  eventFenster = window.open(link, "eventfenster", "width=" + sollBreite + ",height=" + sollHoehe + ",top=" + oben + ",left=" + links + ",resizable=yes,scrollbars=yes");
  eventFenster.focus();
}