Toggle blind on multiple items.

I have a faq where the answers are blinded down when the question is
clicked.
What I want to do is have a link that either blinds up or down all
the answer-elements on the page. When the link is clicked, it should
switch between the text "Show all" / "Hide all" and the
link_to_remote should also change. I figure I´ve made a mess out of it
as it is. Can I somehow make all this in action or something also?

How should I do this?

# in my controller:
def display_all
    render(:update) do |page|
      page.select('div.answer').each do |answer|
        answer.visual_effect(:blind_down, :duration => 0.25, :fps =>
100)
      end

       page.replace_html :toggle_all, link_to_remote("Hide all",
{:url => {:action => :hide_all}}, :id => "toggle_all")
    end
  end

  def hide_all
    render(:update) do |page|
      page.select('div.answer').each do |answer|
        answer.visual_effect(:blind_up, :duration => 0.25, :fps =>
100)
      end

       page.replace_html :toggle_all, link_to_remote("Show all",
{:url => {:action => :display_all}}, :id => "toggle_all")
    end
  end

## in my template:

<%= link_to_remote("Show all",
                            {:url => {:action => :display_all}}, :id
=> "toggle_all")%>