Preventing Default Focus Behavior

Is the focus event cancelable?

In theory, Event.preventDefault() is not supported for focus events.
DOM 2 Event Spec
MSIE onfocus Event

The following tests try prevent the default tab behavior.

Return false from onkeydown HTML attribute

Stop propagation in onkeydown DOM event handler

Stop propagation in onkeydown DOM event handler, capture phase (n/a to IE)

Stop propagation in onkeydown DOM event handler in wrapper element, capture phase (n/a to IE)

Prevent default in onkeydown DOM event handler

Prevent default in onkeydown DOM event handler, capture phase (n/a to IE)

Related Info

Dojo FocusManager proposal