달력에서 지난날짜도 선택가능하게 하려면 어떤부분을 수정해야할까요? 채택완료

</p><p><script type="text/javascript">
</script>
/* Written by DaeKwon Kang (ncrash.dk@gmail.com). */
jQuery(function($){
 $.datepicker.regional['ko'] = {
  closeText: '닫기',
  prevText: '이전달',
  nextText: '다음달',
  currentText: '오늘',
  monthNames: ['1월(JAN)','2월(FEB)','3월(MAR)','4월(APR)','5월(MAY)','6월(JUN)',
  '7월(JUL)','8월(AUG)','9월(SEP)','10월(OCT)','11월(NOV)','12월(DEC)'],
  monthNamesShort: ['1월','2월','3월','4월','5월','6월',
  '7월','8월','9월','10월','11월','12월'],
  dayNames: ['일','월','화','수','목','금','토'],
  dayNamesShort: ['일','월','화','수','목','금','토'],
  dayNamesMin: ['일','월','화','수','목','금','토'],
  weekHeader: 'Wk',
  dateFormat: 'yy-mm-dd',
  firstDay: 0,
  isRTL: false,
  showMonthAfterYear: true,
  yearSuffix: ''};
 $.datepicker.setDefaults($.datepicker.regional['ko']);</p><p> $('#wr_9').datepicker({
  showOn: 'both',
  //buttonImage: '//jqueryui.com/resources/demos/datepicker/images/calendar.gif',
  //buttonImageOnly: true,
  buttonText: "달력",
  changeMonth: true,
  changeYear: true,
  showButtonPanel: true,
  yearRange: 'c-99:c+99',
  minDate: '+0d'
 });
});
</script>​</p><p>