BrandSpankingNew made a re-usable Ajax auto-suggest and auto-complete text field. The AutoSuggest class adds a pulldown menu of suggested values to a text field. The user can either click directly on a suggestion to enter it into the field, or navigate the list using the up and down arrow keys, selecting a value using the enter key.

Requirements: Safari 2.0.4, Firefox 1.5+, Internet Explorer 6.0+
Demo: http://www.brandspankingnew.net/specials/ajax_autosuggest/…
License: Creative Commons License