javascript MutationEvent Description

The W3C DOM MutationEvent object is an abstract object that contains the properties and methods shared by every instance of a W3C DOM event that concerns itself with the modification of the document tree. This object inherits characteristics from the W3C DOM Event. The properties (information such as references to the node affected by the change) and methods of this object are blended into the directly scripted event object. See the discussion of the event object for specific property and method support for this object and how these items are inherited by more specific event types.