How to update more than one div through form_remote_tag

First, you don't want to pass an :update option to form_remote_tag. Then you want to start reading about update_page here:

http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper.html#M001436

Basically you'll return some javascript which will do whatever you want... updating divs, hiding stuff, replacing other stuff, etc...

-philip