# File lib/action_view/helpers/asset_tag_helper.rb, line 52
      def javascript_include_tag(*sources)
        options = sources.last.is_a?(Hash) ? sources.pop.stringify_keys : { }
        sources = ['prototype', 'effects', 'controls', 'dragdrop'] if sources.first == :defaults
        sources.collect { |source|
          source = javascript_path(source)        
          content_tag("script", "", { "type" => "text/javascript", "src" => source }.merge(options))
        }.join("\n")
      end