Automatically show attributes pugin when select category

[izzuan]

Hi OSCLASS expert.
I've a problem. i try to find out how to show an attributes when user select a category at search bar (see picture). For your information, i copy a attributes plugin code at sidebar-search. for now i just success show an attributes plugin when i click a submit button. but now i need a function it show automatically just when i select a category. for example when i click Car category it show Car attributes below.
tq.