window.captureEvents(eventmask)
document.captureEvents(eventmask)
layer.captureEvents(eventmask)
eventmask
An integer that specifies the type of events that the window, document, or layer should capture. This value should be one of the static event type constants defined by the Event class, or it should be a group of event type constants combined with the bitwise-OR (|) or addition operators.
captureEvents( ) is a method of the Window, Document, and Layer classes. Its purpose is the same for all three: in the Netscape 4 event model, captureEvents( ) specifies that all events of a given type or types occurring within the specified window, document, or layer should be passed to the window, document, or layer instead of to the object on which they actually occurred.
The type of the events to be captured is specified by eventmask, a bitmask comprised of static constants defined by the Event class. See the "Event.TYPE" reference page for a full list of these bitmask constants.
Event, Window.handleEvent( ), Window.releaseEvents( ), Window.routeEvent( ); Chapter 19; EventTarget.addEventListener( ) in the DOM reference section