def search_field(field, operator, attributes = {})
  field_op = "#{field}_#{operator}"
  value = (params[:q][field_op] if params[:q])
  title = t(".#{field_op}")
  label_tag = content_tag :label, title
  attributes[:name] = "q[#{field_op}]"
  attributes[:type] ||= 'text'
  attributes[:value] = value
  input_tag = content_tag :input, nil, attributes
  [label_tag, input_tag].join.html_safe
end