Reference

HTML::Prototype

mizzy.org - Catalystでajax (HTML::Prototypeモジュールの使い方)
http://mizzy.org/program/htmlPrototype.html

blog.nomadscafe.jp: HTML::Prototypeを使ったauto complete field
http://blog.nomadscafe.jp/archives/000462.html

autocomplete filed sample
http://nomadscafe.jp/test/autocompletefield/app.cgi/