Hi @dsong3832
ok. Now I understand.
Your solution is a quick and dirty solution. but possible. I would not use it for a complex website. But for a portfolio website which you build yourself it should be fine.
Otherwise you need to use jQuery.
First of all your code looks pretty messed up. Try this:
#hover { background: url('image A.jpg'); background-repeat: no-repeat; background-size: contain; width: 30vw; height: 10vw; } #hover:hover { background: url('image B.jpg'); } <div id="hover"></div>Play around with the size to see what fits you the best.Also you can play around with the background-image-size.
I hope I could help!
Have a good day!
Marius