Kelly-
I am an alcoholic with some young children. I had to realize I needed to stop for myself before I would stop. It sounds like he is aware of his problem, if he tried to stop once before. AA has some "open meetings". Anybody can go to these to get information Perhaps you and him could sit in on an open meeting?
Otherwise, I'd recommend that he see his doctor, and talk to the doc about drinking.
I found out that "functional" is only a phase for an alcoholic. Before I quit, I was merrily dancing the line between functional and dysfunctional.
I hope you hubby can get better. It is a disease, and it is progressive. The only cure seems to be abstinence. AA is one option which can really help.
peace be with you, and your family.
chip