function openSedcard()
{
  var _top = Math.ceil((screen.availHeight - 600) / 2);
  var _left = Math.ceil((screen.availWidth - 500) / 2);
  var kontaktpopup = window.open('sedcard.html', "Sedcard", "width=500,height=600,location=no,menubar=no,resizable=no,scrollbars=yes,status=no,toolbar=no,left=" + _left + ",top=" + _top);
  kontaktpopup.focus();
}