def buffer_next
      buffer_update_info
      @_buffer_ctr += 1
      x = @_buffer_ctr
      l = @_buffers[x]
      if l
        populate_buffer_from_filename x
      else
        @_buffer_ctr = 0 
      end
      set_content @_buffers[@_buffer_ctr], @_buffers_conf[@_buffer_ctr]
      buffer_update_position
    end
def buffer_next
      buffer_update_info
      @_buffer_ctr += 1
      x = @_buffer_ctr
      l = @_buffers[x]
      if l
        populate_buffer_from_filename x
      else
        @_buffer_ctr = 0 
      end
      set_content @_buffers[@_buffer_ctr], @_buffers_conf[@_buffer_ctr]
      buffer_update_position
    end
display next buffer