function changeEventListing(iOffset, iPageId, iLangId, sContentUpdateContainer){
  if (iOffset == undefined){
    iOffset = 0;
  }
  new Ajax.Request(
    'http://www.weissfraecke.de/',
    {
      method: 'post',
      onFailure: function(transport) {
        alert(transport.responseText);
        alert('FEHLER BEIM LISTING!');
      },
      onSuccess: function(transport) {
        var sContent = transport.responseText;
        if (sContentUpdateContainer == "") {
          $('contentFrame').update(sContent);
        } else {
          $(sContentUpdateContainer).update(sContent);
        }
      },
      parameters: {
        'page'    : 'eventCal',
        'sAction' : 'changeEventListing',
        'iOffset' : iOffset,
        'iPageId' : iPageId,
        'iLangId' : iLangId
      }
    }
  );//end - ajax-request
}