last night i got in my car and tried to start it and all it did was makin some clickin noise and wouldn't even attempt to start. This morning i had a friend jump start me and it started right up and i drove it home from the parking lot. it ran fine all the way home and the alternator gauge displayed normal output. i get home turn the car off and try to start it again, same thing. figuring it was the battery i went buy a new one. new battery and it still won't start unless someone jumps me off. any idea on what it could be?