Take a look at http://wordpress.org/extend/plugins/ambrosite-nextprevious-post-link-plus/
Its a plugin that adds extra missing functionality to next_post_link and prev_post_link functions.
Take a look at http://wordpress.org/extend/plugins/ambrosite-nextprevious-post-link-plus/
Its a plugin that adds extra missing functionality to next_post_link and prev_post_link functions.