Demo: jquery-roving-tabindex
Linear
Tab to a list item then use up and down arrows to change the roving tabindex.
Grid
Tab to a cell then use up, down, left and right arrows to change the roving tabindex.
Tab to a list item then use up and down arrows to change the roving tabindex.
Tab to a cell then use up, down, left and right arrows to change the roving tabindex.