Class: HTMLAutoCompleteSelectField  - X-Ref

Text field for selecting a value from a large list of possible values, with
auto-completion and optionally with a select dropdown for selecting common
options.

If one of 'options-messages', 'options', or 'options-message' is provided
and non-empty, the select dropdown will be shown. An 'other' key will be
appended using message 'htmlform-selectorother-other' if not already
present.

Besides the parameters recognized by HTMLTextField, the following are
recognized:
options-messages - As for HTMLSelectField
options - As for HTMLSelectField
options-message - As for HTMLSelectField
autocomplete - Associative array mapping display text to values.
autocomplete-messages - Like autocomplete, but keys are message names.
require-match - Boolean, if true the value must be in the options or the
autocomplete.
other-message - Message to use instead of htmlform-selectorother-other for
the 'other' message.
other - Raw text to use for the 'other' message