Untitled

$(function() {
   var dates = $( "#datepickerStartDate, #datepickerEndDate" ).datepicker({
                showAnim: "drop",
                showOptions: {direction: "left"},
                minDate: 0,
                maxDate: "+3Y",
                changeMonth: true,
                changeYear: true,
                altFormat: "yy-mm-dd",
                defaultDate: "+1w",
                onSelect: function( selectedDate ) {
                    var option = this.id == "datepickerStartDate" ? "minDate" : "maxDate",
                        instance = $( this ).data( "datepicker" ),
                        date = $.datepicker.parseDate(
                            instance.settings.dateFormat ||
                            $.datepicker._defaults.dateFormat,
                            selectedDate, instance.settings );
                    dates.not( this ).datepicker( "option", option, date );

                    if(this.id == "datepickerStartDate")
                    {
                        $(this).datepicker( "option", "altField", '#startDate' );alert($('#startDate').val());
                        $('#endDate').val($('#startDate').val() );
                    }
                    if(this.id == "datepickerEndDate") $(this).datepicker( "option", "altField", '#endDate' );

                }
            });
        });