Google Adsense Rails 3 helper

adsense_helper.rb

module AdsenseHelper
  
  # Author: Tomasz Mazur ([email protected])
  # http://www.mydigitallife.info/2009/01/17/google-adsense-legacy-old-generation-code-reference-generate-and-get/
  # :slot
  # :theme
  #   :background
  #   :border
  #   :link
  #   :text
  #   :url
  # :channel 10 digits
  # :type "text", "text_image", "image"
  # :alternate_url
  
  # 120×90_0ads_al (4 links)
  # 120×90_0ads_al_s (5 links)
  # 160×90_0ads_al (4 links)
  # 160×90_0ads_al_s (5 links)
  # 180×90_0ads_al (4 links)
  # 180×90_0ads_al_s (5 links)
  # 200×90_0ads_al (4 links)
  # 200×90_0ads_al_s (5 links)
  # 468×15_0ads_al (4 links)
  # 468×15_0ads_al_s (5 links)
  # 728×15_0ads_al (4 links)
  # 728×15_0ads_al_s (5 links)


# links_per_unit
# def link_unit(type, client, theme = {}, options = {})
# end
  
  
  def ad_unit(type, client = "pub-xxxxxxxxxxxxxxxx", options = {})
  
    units = {
      :leader_board     => "728x90",
      :wide_skyscraper  => "160x600",
      :banner           => "468x60",
      :half_banner      => "468x30",
      :skyscraper       => "120x600",
      :vertical_banner  => "120x240",
      :large_rectangle  => "336x280",
      :medium_rectangle => "300x250",
      :square           => "250x250",
      :small_square     => "200x200",
      :small_rectangle  => "180x150",
      :button           => "125x125"
    }

    unit = units[type]
    width, height = unit.split("x")
    
    opts = {}
    opts[:google_ad_client] = client
    opts[:google_ad_width]  = width.to_i
    opts[:google_ad_height] = height.to_i
    
    if options[:slot]
      opts[:google_ad_slot] = options[:slot]
    else
      opts[:google_ad_type] = options[:type]
      opts[:google_ad_format] = "#{unit}_as"
      if options[:theme]
        opts[:google_color_border] = options[:theme][:border]
        opts[:google_color_link] = options[:theme][:link]
        opts[:google_color_background] = options[:theme][:background]
        opts[:google_color_text] = options[:theme][:text]
        opts[:google_color_url] = options[:theme][:url]
      end
    end
    
    adsense_opts = opts.map do |k, v|
      v = v.is_a?(String) ? "\"#{v}\"" : v
      "#{k} = #{v};" unless v.blank?
    end.compact.sort.join("\n")
    
    content_tag(:div, [javascript_tag(adsense_opts), content_tag(:script, nil, :type => "text/javascript",
     :src => "http://pagead2.googlesyndication.com/pagead/show_ads.js")].join("\n").html_safe, :class => "google_adsense #{type}")
  end

end

So i put the above script on a rb file then put
<%= ad_unit(:leader_board, "your-adsense-id" %>
where i want it?