Keyboard Support for Openerp

I've a made a monkeypatch in the xml file of the point of sale that allows users to use the openerp point of sale without touchscreen hardware, only by keyboard. Theres one last step that I can't solve no matter, no how, that is to move from the search bar to the products list without the tab key. The end goal is to achieve navigation of the products through arrow keys. Any contribution is very appreciated.