I have:

VIEW:

<%= form_remote_tag :url => {:controller => 'graphs',
                                    :action => 'img_url'}, etc


CONTROLLER:

def img_url
  render_text "<img src=/graphs/total?graph%5Bstart%5D=#{params[:graph][:start]}&graph%5Bperiod%5D=#{params[:graph][:period]}&graph%5Brate%5D=#{params[:graph][:rate]}>"
end

This is working, but now I want :

VIEW:

<%= form_remote_tag :url => {:controller => 'graphs',
                                    :action => 'img_url("total"'}, etc

CONTROLLER:

def img_url(type)
  render_text "<img src=/graphs/#{type}?graph%5Bstart%5D=#{params[:graph][:start]}&graph%5Bperiod%5D=#{params[:graph][:period]}&graph%5Brate%5D=#{params[:graph][:rate]}>"
end

But its not working like that. :/