Lol, I was about to say the exact opposite. But I guess it depends - are they fighting \'1 on 1\' like in a wrestling ring? Or does the fight start in like each of their bases?
Because if they start in a ring - Superman could just crush Batman like an insect in a matter of miliseconds... Batman is just a human being after all. But as 182Ways said, if given enough time and such, Batman could make use of technology, his brain and kryptonite.