function showPopupVerkauf() {
  Shadowbox.open({
      content:    '/popup/verkauf.php',
      player:     "iframe",
      title:      "",
      height:     550,
      width:      400
  });
}

function showPopupZubehoer() {
  Shadowbox.open({
      content:    '/popup/zubehoer.php',
      player:     "iframe",
      title:      "",
      height:     550,
      width:      400
  });
}

function showPopupWerkstatt() {
  Shadowbox.open({
      content:    '/popup/werkstatt.php',
      player:     "iframe",
      title:      "",
      height:     580,
      width:      400
  });
}