Hi there. Here's the link to the search page:
media/
So as you click on one of the links under MEDIA JOBS BY SECTOR say TV Jobs (40) it will narrow the results AND place TV Jobs into the Grey Expand Box above. To widen the criteria you would click the [remove] link next to TV Jobs and that would remove that parameter from the results. Noticing that the URL at the top changes accordingly:-
jobs/ = the root page
media/ = the media selected as industry
tv/ = TV Jobs added as Sector
europe/ = Europe added as location
europe/ = Sector removed
Hope this helps