I took the car to get gas tonight, and on the way out of the driveway, my ABS and airbag lights came on.........and stayed on the entire time and stay on all the time now. Why did this happen?

Try cleaning this ground.

and if that doesnt work there is a ground on the shock tower on the passengers side clean that one and the power side also.. if that just came on then theres probably a voltage problem somewhere....

Yup, try the one with the black wires next to the big red plastic power block just above the battery on the passenger side fender.