module AjaxLoading
  module ActiveRecordExtensions
    def element_id(*args)
      args << self
      args.map{|t|
        t.kind_of?(ActiveRecord::Base) ?
            "#{t.class.name.underscore}_#{t.new_record? ? "new" : t.id}" :
            t.to_s
      }.join('_')
    end
  end
end

ActiveRecord::Base.send :include, AjaxLoading::ActiveRecordExtensions