codice:
MovieClip.prototype.elastic = function() {
	this.physics = [0.25, 0.9];
	this.xspeed = this.yspeed=0;
	function funcElastic(mc) {
		with (mc) {
			xspeed = ((_parent._xmouse-_x)*physics[0])+(xspeed*physics[1]);
			yspeed = ((_parent._ymouse-_y)*physics[0])+(yspeed*physics[1]);
			_x += xspeed;
			_y += yspeed;
		}
		updateAfterEvent();
	}
	this.ID_elastic = setInterval(funcElastic, 50, this);
};

esempio:

codice:
nomeClip.elastic();