jQuery UI Datepicker - allow only certain weekdays

Question

I\'m using jquery UI datepicker on a huge project and I realize now that I\'ll need to allow only certain weekdays on some areas. I read their documentation and didn\'t find

Answer 1

$( ".datepicker.future" ).datepicker('option','beforeShowDay',function(date){
    var td = date.getDay();
    var ret = [(date.getDay() != 0 && date.getDay() != 6),'',(td != 'Sat' && td != 'Sun')?'':'only on workday'];
    return ret;
});