Need an ajax hack that will disable the word Internet in "Where did you find us"field

[BamaStangGuy]

Ok so apparently making the description bold and saying "Do not put internet" where you found us isn't enough for some of the bright people on the internet.

I need a hack that when someone types in internet or "the internet" in the Where did you find us field it will turn red and maybe pop up with a funny custom message that I put in.

Anyone game for it?

This is on the Registration page btw