Help! Disney keeps going after the skunk

After being sprayed last Thursday night, Disney hasn't learned a lesson. Every time I let her out to go to the bathroom she goes hunting for that skunk and tonight she found it again. Luckily it didn't spray her but I don't see how. She was on top of it trying to bite it. Keep in mind she is only 10 pounds. The skunk got under the deck and she wasn't able to squeeze through to get it. I got her in before she figured out how.

What can I do? Is there a skunk repellent that works? How do I break Disney - 11+ years old - from trying to get it? She thinks she is a 75 pound guard dog. Help!!

Oh yeah, my yard is completely fenced in with chain link and I think the skunk is digging his way in under the fence or squeezing in through posts. I don't have good enough lighting to be able to see the entire yard in the dark either.

I think I've heard something about skunks not liking moth balls, but at the same time I think moth balls may be harmful to pets.
Hopefully someone has some better advice than I do.