jQuery-UI Datepicker:可拖动？

$(function() {
  var datepicker = $("#datepicker").datepicker({
    defaultDate: "+1w",
    changeMonth: true,
    changeYear: true,
    numberOfMonths: 1,
    onSelect: function(selectedDate) {
      $(this).draggable("option", "disabled", true);
    }
  }).draggable({
    onDrag: function(event, ui) {
      var selectedDate = $(this).datepicker("getDate");
      if (selectedDate) {
        var minDate = $(this).datepicker("option", "minDate");
        var maxDate = $(this).datepicker("option", "maxDate");
        if (+selectedDate < +minDate || +selectedDate > +maxDate) {
          $(this).datepicker("setDate", null);
        }
      }
    },
    onStop: function(event, ui) {
      $(this).draggable("option", "disabled", false);
    }
  });
});