We talk of cloaking and whether its right or wrong and some say Javascript redirect is a form of cloaking think in some intances its ok , for example Have you seen the Warner Bros sites cache on google with your Javascript off and then with your JavaScript on. I do exactly the same thing for one of my sites it, Looking at this makes me feel a lot better. If Im too specific about sites Im sorry. Also if this has been talked about before Im sorry again.
regards,
Mark