make terms page submit button count down

[Mythotical]

I am wanting to know if there is a way to make the submit button at the bottom of the terms that must be read when registering to countdown from a number that I choose.

Example at this site: http://www.woltlab.de/en/forum/register.php

Their accept button counts down from 9 and you can't click the button until it reaches 0.

Anyone know.

Any help much appreciated.

Thanks
Myth