last night i was driving and slowly the car started to die out. The headlights, dash lights, power windows, all stopped working and the car would not accelerate anymore. Eventually it just died. After letting sit for a half hour or so, waiting to get towed home by a friend, the car started up agian (i guess the better had some juice left) but same thing happen again as i try to drive it. I think the alternator might be bad but wanted to get some feed back. all help is appriciated.

P.S. the car started up this morning again but slowly the lights were dimming out and the engine would die.
Thanks