JavaScript for online quiz?

Question

Maybe a noob question, but I am really confused.
I'm trying to make an online quiz, where user has to choose between 4 possible answers. But I got stuck, well, because 1 question is really bothering me. So:

I have a JavaScript function which changes background color of a button and disables it, when user clicks on the wrong answer. And the right answer button (submit) calls for non-existent function, just to confuse people, if they decide to take a quick look at the source code. Everything went great, but then I started to think. What if user decides to take a deeper look at my source code? He would be able to see my JavaScript functions and, well, he could probably figure out the right answer without really playing.

Is there any way I could hide the source (as I understand, it's not possible with JavaScript), but maybe I could use something else? What are other developers using in these situations? Any suggestions? :)

Answer 1

If you want to be really safe, you have to do it on the server side (e.g. PHP). What you could possibly do to make it more difficult for cheaters is to obfuscate your javascript code by one of the various js obfuscators like this one which can never bring full security.