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# HOWTO #
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1) add the :mark action
2) use css class "marked_records_action" for actions working with marked records
3) use the controller method "marked_records" to retrieve the IDs of marked records

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# Example code for Comments controller #
########################################

config.actions.add :mark
config.action_links.add('delete_selected', :label => 'Delete selected comments', :type => :collection, :method => :post,
  :position => false, :html_options => {:class => 'marked_records_action'})

...

def delete_selected
  record_ids = marked_records
  Comment.where(:id => record_ids).all.each do |comment|
    comment.deleted = true
    comment.save(:columns => [:deleted], :validate => false)
  end
  render :update do |page|
    record_ids.each do |record_id|
      page.remove(element_row_id(:action => 'list', :id => record_id))
    end
  end
end