How to re - rendering date picker

How to render an existing jquery datePicker based upon new values upon ajax post? And how do I change the start date of di开发者_StackOverflow中文版splay based upon a particular date in the ajax post

1. Fire a function, that generates the date picker, when the ajax response is ready.
2. jQuery date picker has option defaultDate, which You can also change, when rendering new version of date picker.