Help me to learn more and more

Dear FriendsI got a very good link to create and modify Table (including size color width etc) in Rich text field. The link for the same is IBM Developer. If I would like to learn some innovative things (for Rich text validation or Attachments validation or any other thing) I could not get correct path. If I open above URL till lotus/library it does not work. Please guide me correct path to learn more and more innovative things.