javascript MouseEvent Description

The W3C DOM MouseEvent object is an abstract object that contains the properties and methods shared by every instance of a W3C DOM mouse-related event. This object inherits characteristics from the W3C DOM Event and UIEvent objects. The properties (information such as click coordinates) 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.