var speed = 6;
var shipMc = this.attachMovie("ship1", "ship1", 10000);
shipMc._y = Stage.height-(shipMc._height+10);
shipMc._x = Stage.width/2 - (shipMc._width/2) ;

function moveShip() {

if (Key.isDown(Key.UP)) {
shipMc._y -= speed;
}
if (Key.isDown(Key.DOWN)) {
shipMc._y += speed;
}
if (Key.isDown(Key.LEFT)) {
shipMc._x -= speed;
}
if (Key.isDown(Key.RIGHT)) {
shipMc._x += speed;
}
}
this.onEnterFrame = function(){
	moveShip();
};