Detecting Browser Version

So, I'm making a website, and IE is playing up and not working like the other damn browsers, as per usual.

Now, I had a script working where it showed a different stylesheet for IE than it did for Firefox, but then I found out the browser versions in IE displayed different things too.

I was wondering if any of you nice, kind people, could possibly write me a script that detects the browser version for IE, and shows different things, and then... well I can do the else parts myself. lol.

Thanks for the help.