Make Album artist = Artist field

I have been trying to make a script for this in actions for a while now. Can anyone help me?

I want a script to tag all of the "Album Artist" fields the same as the "Artist" fields in my library. Thanks in advance.

FAQ: How can I copy one field value to another field?

Thanks, but Album Artist isn't an option in the field. Am I missing something? Thanks again.

"Album Artist" might be just a label, please check with "View > Extended Tags" what's the real tag name.
If it still is not in the list you can just enter it.

True label is "Band". Thanks Dano, and thanks to all.