[jQuery] using json in $.post

[james_027]

hi,

I very new with json ( you may say that I still really don't
understand it quite well), how do I use the json object that is return
from the $.post in its callback argument?

$.post('/ap/item/code/edit/',
                values,
                function (data){
                        //how to access the json object from the data?
                }
        );

the data is json object in particular is a dictionary

thanks
james