post/category navigation question!

Hello!

so, I’m using this code
<?php next_post_link('%link', 'previous', $in_same_cat = true) ?>
for the previous/next buttons that navigate from one post to another.
but what I’m trying to find out, is how can a user click the next button, at the last post of a category, and get to the first post of the next category?
right now, when clicking next a few times, the category finishes, and the next button disappears.

is there an option for defining a way to get to the first post of the next category, from the last post of the previous one, by adding some code to this?

thanx in advance!
-max