OK, so you found this secret page with extra help for the Lunar Lander Flash project. Here is some code that works - don't forget to try to understand it though!
vy = 0;
vx = 0;
_root.onEnterFrame = function() {
     if (_root.lander1._y <_root.pad1._y) {
          vy = vy + 0.1;
          _root.lander1._y = _root.lander1._y + vy;
          _root.lander1._x = _root.lander1._x + vx;
     } else {
          landerright = _root.lander1._x + _root.lander1._width;
          padright = _root.pad1._x + _root.pad1._width;
          if ((_root.lander1._x > _root.pad1._x) && (landerright < padright)) {
               message = "The Eagle has landed";
          } else {
               message = "The Eagle just died";
          }
     }
};