Javascript HELP!!!!

[adam2001]

Hi ppl

heres my problem http://users.surfanytime.co.uk/katn_xp

veiw source and please tell me whats going on.

The problem is when i press the submit button an error messge pops up saying " 'length' is null or not an object" or someat like that. Please help because this is the basis for my entire sites quiz score script.

Its in the function radio_active() (line 81), it has something to do with the radio_group.length property. Its weird i dont know why it dont work.

I need some serious help here guys please help me solve it.

Thanx in advance

[SamIAm]

I think the problem is due to the fact that radio buttons don't return a default value when they haven't been clicked. Therefore, when you try to evaluate a reference it complains!