jump ="no"	


if (Key.isDown(Key.UP) && jump == "no") {
		starty = _root.mario._y;
		jump = "yes";
		jumpv = -10;
	}
	if (jump == "yes") {
		jumpv += 1;
		_root.mario._y += jumpv;
	}
	if (_root.mario._y>starty) {
		_root.mario._y = starty;
		jump = "no";
	}