MonthYearPicker exposes a rich 
client-side API that allows you to control its behavior.
     You can manipulate the Min/MaxDate properties by the following client-side functions:     
- get_minDate( ) - Returns the date, representing the MinDate of             the datepicker.
- set_minDate(date) - if the date is valid, the datepicker MinDate             is set to it. 
- get_maxDate( ) - Returns the date, representing the MaxDate of             the datepicker.
- set_maxDate(date) - if the date is valid, the datepicker MaxDate             is set to it. 
     You can manipulate the date selection by using the GetDate()/SetDate(newValue) method     pair:     
var selectedDate = monthyearPicker.get_selectedDate();         
         var year = (selectedDate.getFullYear() + 1);         
         var month = (selectedDate.getMonth());         
         var date = selectedDate.getDate();         
         monthyearPicker.set_selectedDate(new Date(year, month, date));     The datepicker child controls (RadDateInput and DatePopupButton) are available via     the DateInput and DatePopupButton properties.