What frog is this?

We found this little guy in a rather dry grassy area in Durban, South Africa. Usually we don't see frogs around here but rather large toads (actually not sure if this is a frog or toad, just assuming), so this was quite unusual, not to mention the white colouring. We don't really know too much about frogs so some info would be much appreciated. My boyfriend wanted to take him home with us, but being the nature conservationist that I am I wouldn't allow it, but I must admit I'm starting to wonder if perhaps we should have, as the poor thing looked terribly out of place in this huge, dry, grassy park. We even began to think that maybe it even escaped away from a human home. If somebody with knowledge on frogs and South Africa could help us it would be so great! Thanks in advance!
(Please note the little specs on it are pieces of grass and dirt)