Captcha-Reload Hotfix

Hey,
You've just merged this into the script and I gave it a try, but the reload function is not working under Firefox, because of the missing "?" behind " login/showCaptcha" in the link.

The links now look something like this: "login/showCaptcha0.12456148" instead of "login/showCaptcha?0.12456148" if you want to reload the captcha.

I hope you understand what I'm trying to explain.