buttons
shows/hides the Today and Clear buttons in the lower part of RangeCalendar
current
opens RangeCalendar at the specified date
done
shows/hides the Done button
end
sets the end date of a range in RangeCalendar
markers
highlights a specified date range in RangeCalendar
months
sets the number of calendars in RangeCalendar
start
sets the start date of a range in RangeCalendar