dateformat.js - 日付フォーマット変換ライブラリ

prototype.jsベースのWYSIWYGエディタウィジェット「Control.TextArea」:phpspot開発日誌
Control.TextArea : Cross Browser TextArea Manipulation

Decent, flexible WYSIWYG editing in the browser is still an inconsistent affair at best in terms of user experience, integration effort, and generated markup. In the meantime a crop of text formatting languages such as Markdown, Textile, BBCode and wiki markup have emerged as ways for users to enter rich content in a controlled fashion.