def method_missing(id_or_class, *args, &block)
      if id_or_class.to_s =~ /(.*)!$/
        @attrs[:id] = $1
      else
        id = id_or_class
        @attrs[:class] = @attrs[:class] ? "#{@attrs[:class]} #{id}".strip : id
      end

      unless args.empty?
        if args.last.respond_to? :to_hash
          @attrs.merge! args.pop.to_hash
        end
      end

      args.push(@attrs)

      while @stream.length > @original_stream_length
        @stream.pop
      end

      if block
        @builder.tag! @sym, *args, &block
      else
        @builder.tag! @sym, *args
      end

      self
    end
def method_missing(id_or_class, *args, &block)
      if id_or_class.to_s =~ /(.*)!$/
        @attrs[:id] = $1
      else
        id = id_or_class
        @attrs[:class] = @attrs[:class] ? "#{@attrs[:class]} #{id}".strip : id
      end

      unless args.empty?
        if args.last.respond_to? :to_hash
          @attrs.merge! args.pop.to_hash
        end
      end

      args.push(@attrs)

      while @stream.length > @original_stream_length
        @stream.pop
      end

      if block
        @builder.tag! @sym, *args, &block
      else
        @builder.tag! @sym, *args
      end

      self
    end
Adds attributes to an element.  Bang methods set the :id attribute.
 Other methods add to the :class attribute.