Welcome to the Frog Forum!

I believe, after doing a bit of research, they are one of the following:

Squirrel Treefrog (Hyla Squirrella):
Squirrel Treefrog in Alabama

Ornate Chorus frog (Pseudacris Ornata):
Ornate Chorus Frog in Alabama

Pine Barrens Treefrog (Hyla Andersonii):
Pine Barrens Treefrog in Alabama

Green Treefrog (Hyla Cinerea):
Green Treefrog in Alabama

However, only when they become juveniles or adults will we really be able to identify them.

I like the look of your setup . By the way, what are you feeding the frogs? If you've not done so already, I strongly suggest picking up some Reptile Multi-Vitamin Dusting powder and Reptile Calcium + Vitamin D3 powder. Lightly dust the crickets/wingless fruitflies once every week for the Multi-Vitamin Dusting and every other feeding for the Calcium + Vitamin D3 Dusting. To dust, simple place the crickets in a plastic bag, add a pinch or so of the dusting, seal the bag, shake it around a bit, and then serve the dusted crickets/wingless fruitflies to the frogs!

Also, make sure all water you use is either Reverse Osmosis or Conditioned by a product such as Aquatize Water Conditioner. The Chlorine or Chloramine in tap water is toxic to frogs and Distilled water lacks the minerals frogs require.

Good work so far!