建一个电影属性的元件（mc），做一个小黑三角形，箭头向下，拖动放在场景外，实例名为：arrows

然后在场景的第一帧加上：

this.stop();
speedgo = 0.14999999999999999;
MovieClip.prototype.moveTo = function(speed, targetX, targetY) {
    var Register_1_ = this;
    Register_1_._x +=  speed * (targetX - Register_1_._x);
    Register_1_._y +=  speed * (targetY - Register_1_._y);
};
_root.bt1.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 72, 305);
    };
};
_root.bt2.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 162, 305);
    };
};
_root.bt3.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 252, 305);
    };
};
_root.bt4.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 342, 305);
    };
};
_root.bt5.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 432, 305);
    };
};
_root.bt6.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 522, 305);
    };
};
_root.bt7.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 612, 305);
    };
};
_root.bt8.onRollOver = function() {
    _root.arrows.onEnterFrame = function() {
        this.moveTo(speedgo, 702, 305);
    };
};

附： bt1到bt8分别为按钮的实例名。

见效果