ajax CalendarExtender control help?

Hi, I am using ajax CalendarExtender control on web form, there are two ajax CalendarExtender controls for "From:" and "To:"  date text box.
I want to display month dates according to first selected date. For example: User select 12/05/2009 in first Calendar control and when the user click on second Calender control then it should display dates for month May 2009 ( same month as in first calendar control.
 How can i do it?
 
Thanks
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