After that paste this into your browser developer console.
Thanks, I'll play with it when I have a bit more time.
I cannot reproduce this ATM, so website owner took the phishing version down, or is targetting only specific IP addresses, or found a less stupid way of stealing bitcoins :-)
It could also be the site owner reset or increased his pool of private keys. If he reuses many keys, you won't quickly find one that's funded already. The addresses may not have been funded yet, but it could still be the owner keep track of them.