JavaScript

Effects

Debugging Console Script
Be sure set Debug.s_enabled=true in your web page to enable debug output.

Tests

Event keyCode test page

Viewport tests (quirks mode test, strict mode test, results)
The yellow cells in the results indicate the values I am using in the GWT Tk.

Focus/Mouse Event Ordering

Preventing Default Focus Behavior

Event Button Detection

Safari 3 Verion Detection