Datepicker 設定日期選擇範圍

$(function() {
    $(".timepicker").timePicker();
    $(".datepicker").datepicker({
        dateFormat: 'yy-mm-dd',
        changeMonth: true,
        changeYear: true,
        beforeShow: customRange
    });
});
function customRange(input) //設定datepicker的日期範圍
{
return {
         minDate: (input.id == "pre_statistic_end_date" ? $("#pre_statistic_start_date").datepicker("getDate") : null),
         maxDate: (input.id == "pre_statistic_start_date" ? $("#pre_statistic_end_date").datepicker("getDate") : null)
       };
}

http://stackoverflow.com/questions/330737/jquery-datepicker-2-inputs-textboxes-and-restricting-range