battery draining

I have a 1997 j30t and my batteries keep dieing out. They used to last a year, now this last one lasted 2 days. I read that generally the alternator is not the problem with this. I also have probs with radio intermtiingly working. Any ideas? Please help.

Alternator grounding: High possibility that the support bracket is oxidized. Ruins battery, voltage regulator, battery, vol...

How to get grounded; see my site for the gnd: http://www.cardomain.com/memberpage/748507/10

OK I will take my car in with a printout of your page to my local car repair. I am not a handy gal with sort of thing. Much thanks for your reply