Problems with electrics?

I was driving along (Hyundai Coupe) with almost every electrical item on my car going, including fog lights, when the radio cut out, both headlights blew and both my ABS and Airbag lights came on. The car drives, although I haven't taken it for more than a run around the block, and the dashboard lights fade in and out. - What the heck could be the cause?

Alan Parker
February 2008