How to set startDate to Endate

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jQuery

How could i make so selected date from datepicker are equals other datepicker so for ex if in start select 2014-12-08 end should also be 2014-12-08

(function ($) {
        $(function () {
            $("#datepicker").datepicker({
              
                dateFormat: 'yy-mm-dd',
                beforeShowDay: $.datepicker.noWeekends,
                onSelect: function () {
                    var date = $("#datepicker").datepicker('getDate');
                  
                    if (date) {
                        date.getDate();
                        dateto.setDate(date);
                    }
                    $('#datepickerto').datepicker('option', 'minDate', date);
                }
               
            });
          
           $("#datepickerto").datepicker({
             
               dateFormat: 'yy-mm-dd',
               beforeShowDay: $.datepicker.noWeekends 
           });
           
        });
    })(jQuery);