How to change the focus date on a inline UI Date Picker ...

How to change the focus date, on a inline UI Date Picker with simple
links ?
So, when I press a "next button", the calendar need to be updated to a
specif date.
I tries all possible situations that I know but no luck.
The jQuery.datepicker._adjustDate function is not enoght or good. I
know the date and I want to change the calendar focus to that date.
Many thanks
Cristian