Hierarchy for DOM Level 2 Events

DocumentEvent - Interface for the 'document' used to create events.
Event - The base class from which event instances inherit.
- MutationEvent - Provides contextual information associated with a specific Mutation event.
- UIEvent - Provides contextual information associated with a specific User Interface event.
  - MouseEvent - Provides contextual information associated with a specific Mouse event.
EventException
EventListener - Interface for objects which catch events.
EventTarget - Interface inherited by all Nodes in a document which supports event handling.