Setting Datepicker invalid dates

Setting Datepicker invalid dates

Hello all,
 
As a relative newcomer to jQueryUI (but not to development) I am struggling to find a way to disable certain dates from being selected in a datepicker control.
 
I can do this with another jQuery datepicker control but I wanr to be able to keep my theme across the entire  site the same.
 
With the jdPicker control from http://jdpicker.p4ul.info/?p=doc I provide an array of dates in the option non_selecable in the current date format.  Is something like this possible in datepicker?
 
Thanks,
 
tip2tail