[color=#00008b]
新建一个空白Mc ,拖到scene里.

然后

onClipEvent(load)
{
	MovieWidth = 764;
	ActualHeight = 40;
	BlockWidth = 764;
	PicSpacing = 9;
	speed = (this._xmouse - MovieWidth / 2) / 20;
	
	}
onClipEvent(enterFrame)
{
	if (_xmouse > 0 && _xmouse < MovieWidth && _ymouse > 0 && _ymouse < ActualHeight) {
		if (speed > 0) {
			speed -= 0.3;
			if (speed < 0) {
				speed = 0;
			}
		} else if (speed < 0) {
			speed += 0.3;
			if (speed > 0) {
				speed = 0;
			}
		}
	} else {
		speed = (this._xmouse - 764 / 2) / 20;
	}
	if(speed>=3){speed=3;}
	if(speed<=-3){speed=-3;}
	
	_root.mc1._x += speed;
	_root.mc2._x += speed;
	_root.speed=speed;
	}

mc1: 

onClipEvent(enterFrame)
{
 if (this._x <= 764 / 2) {
       _root.mc2._x = this._x + 764 + 9;
 	}
if (this._x >= 764 / 2) {
	 _root.mc2._x = this._x - 764 - 9;
	 }
}

mc2:

onClipEvent(enterFrame)
{
	if (this._x <= 764 / 2) {
		 _root.mc1._x = this._x + 764 + 9;
	}
	if (this._x >= 764 / 2) {
		_root.mc1._x = this._x - 764 - 9;
	}
}
[/color]