jQuery.extend(DateInput.DEFAULT_OPTS, {
  month_names: ["Januar", "Februar", "März", "April", "Mai", "Juni", "Juli", "August", "September", "Oktober", "November", "Dezember"],
  short_month_names: ["Jan", "Feb", "Mär", "Apr", "Mai", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dez"],
  short_day_names: ["So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"],
  start_of_week: 1,
  stringToDate: function(string) {
    var matches;
    if (matches = string.match(/^(\d{2,2}).(\d{2,2}).(\d{4,4})$/)) {
      return new Date(matches[3], matches[2] - 1, matches[1]);
    } else {
      return null;
    };
  },
  dateToString: function(date) {
    var month = (date.getMonth() + 1).toString();
    var dom = date.getDate().toString();
    if (month.length == 1) month = "0" + month;
    if (dom.length == 1) dom = "0" + dom;
    return dom + "." + month + "." + date.getFullYear();
  }

});