iter1.rb

    def check_box(method_or_attrs = {}, attrs = {})
      unless method_or_attrs.is_a?(Hash)
        method = method_or_attrs
        name = control_name(method)
        update_control_fields(method, attrs, "checkbox")
        check_box({:name => name}.merge(attrs))
      else
        attrs = method_or_attrs
      end
      update_fields(attrs, "checkbox")
      if attrs.delete(:boolean)
        on, off = attrs.delete(:on), attrs.delete(:off)
        hidden_field(:name => attrs[:name], :value => off) <<
          self_closing_tag(:input, {:type => "checkbox", :value => on}.merge(attrs))
      else
        self_closing_tag(:input, {:type => "checkbox"}.merge(attrs))
      end
    end