<% if current_user %> <% if @rating_comment %> <%= link_to_function 'Edit your review', "Element.hide('comment-action'); new Effect.SlideDown('comment-form')" %> <% else %> <%= link_to_function 'Add a review', "Element.hide('comment-action'); new Effect.SlideDown('comment-form')" %> <% end %> <% end %>