# File app/helpers/application_helper.rb, line 304
    def checkbox_group(field, choices, options={})
      title = options.delete(:title) || label_for_field(@object, field)
      note = options.delete(:note)

      fieldname = "#{@object_name}[#{field.singularize}_ids][]"

      with_format(title,
                  choices.map { |item|
                    res = []
                    res << '<span'
                    res << "class=\"#{options[:class]}\"" if options[:class]
                    res << '><input type="checkbox"'
                    if @object.send(field.to_s.pluralize).include? item
                      res << 'checked="checked"'
                    end
                    res << "id=\"#{fieldname}\" name=\"#{fieldname}\" "
                    res << "value=\"#{item.id}\"> #{_ item.name}</span><br/>"
                    
                    res.join(' ') }.to_s,
                  note)
    end