It looks like your browser detection code believes that the browser version is a single digit, which means I get this error:
===
You are using an old version of Internet Explorer. Some features of this website will not work! Please consider upgrading to the latest version, or installing a faster and more modern browser like Mozilla Firefox
===
when using Internet Explorer 10 on Windows 8.

It would be good to update this code to handle multi-digit versions. If you borrowed/copied the code, it might be a good idea to let them know too. :)

Thanks, looking into it!