Can Jailbroken Iphones still upgrade to ios6?

I have a jailbroken iphone 4s and it's ios5 and it says I can get the ios6 and all, but will it crash or will anything happen? Or can I just click download and it'll work fine?

It will most likely brick.
your stuck on 5.1.1

You can upgrade just fine as long as you don't plan on keeping your jailbreak. If you would like to remain jailbroken, you'll have to wait until a jailbreak is available for iOS6 which can take a few weeks or a few months (which is more likely), there's no telling. If you're thinking about upgrading to iOS6 and then downgrading back to 5.1.1, I would highly suggest not doing that unless you really know what you're doing. That can be very tricky and you could easily brick your phone.

DO NOT UPDATE IT! If you jailbroke it with absinthe, you need to wait until they come out with an update. I asked the same question haha, thats wat i got.