how to avoid Set focus on Tab Panel Hearder?

I am using AJAX Tab Container Control for my Web app. with 8 Tabs(Tab Panels) in it.
Using Javasctipt, I have prevented the user from clicking the tab panel header to navigate on tabs
instead I let them navigate using buttons(Previous & Next).

But my problem is when a certain tab was activated, the System automatically set its focus on the header of active panel
instead of the first control within the active panel.