How to display controller specific javascript in rails 3.1?

I have my assets folder structure like this

assets
  javascripts
    products
      --product.js
      --productValidate.js
    store
      --store.js
I want the project.js and projectValidate.js to be added in my
application.js as a part of asset pipe-lining only when actions in
product controller is called and store.js when actions in store
controller is called. How can i achieve this in rails 3.1?