[jQuery] Customize datepicker date range

[jQuery] Customize datepicker date range


how i can custom the dateRange (default are 10 years before/ after the
date).
I use this function
$('.dateRange').attachDatepicker({beforeShow: customRange});
function customRange(input) {
    return {minDate: ('1990'),
        maxDate: ('2040')};
}
but it doesnt work