Automagically restart wifi connection

[Mauricio Tavares <raubvogel gmail com>]

      I have here a machine that is connected to the internet through
wireless. Every so often it will loose connection to the router. And
to get it back I have to maually go into Network Manager, disable the
connection, and then re-enable it. Is there a way to tell network
manager if it loses its connection it should do something like that?