Get rid of it. The most you should do is detect IE6 and give them a screen saying “this website – along with the rest of the thinking universe – is no longer tested for your browser. Go get a new one.”
Yes, I understand that it’s still the mainstay browser of lots of large enterprises. The only reason that their IT departments haven’t switched is because it’s kind of a pain in the ass. I guarantee there are lots of IT admins out there who actively want an excuse to install a modern browser across their enterprises. Just give them a reason.
