Focus/control movement on pressing 'tab' or 'enter'

Hi,

The way control moves from one widget to another is a bit different in extJS if we keep pressing 'tab'.

To enter in a region/container or to highlight a widget present inside a container we need to press 'enter' and 'esc' to come out.

Can we override this behaviour of extjs? Can we control this focus movement on our own?

Also, for grouping controls/widgets I use 'Container' class. To move amongst the widgets if we keep pressing tab or enter, ExtJS focuses such components also which are only used for right arrangement of main widgets.

Is there a way to focus only the child elements and not the container component?

If you do know anything in this regard, please let me know.

Thanks in advance.