Helpers to use Rails image_paths in CSS background images

gistfile1.rb

module AssetsHelper
  def background_images(images)
    content_for :head do
      content_tag(:style, :type => 'text/css') do
        images.map{|selector, path| css_background_image(selector, path)}.
          join("\n")
      end
    end
  end

  def css_background_image(selector, given_path)
    c_a = "#{params[:controller]}/#{params[:action]}"
    path = given_path =~ %r{/} ? given_path : "#{c_a}/#{given_path}"
    <<-CSS
    #{selector} {
      background-image: url('#{image_path(path)}');
    }
    CSS
  end
end