Here are some random references and code snippets for client-side scripting using JavaScript. A lot of it is very primitive, as I haven't done any serious JavaScript work since around 1998.

Form Reference
Brings together information about Web forms, including their HTML attributes, server-side processing, and JavaScript properties, methods, and event handlers.
Context Menu Override
A simple trick to disable the context menu that appears on right-click.
Stupid Mouse Tricks
Tracking the location of the mouse within a page or screen and detecting when a mouse button is pressed.