OpacityTween.prototype = new Tween();

OpacityTween.prototype.constructor = Tween;

OpacityTween.superclass = Tween.prototype;



function OpacityTween(obj,func,fromOpacity,toOpacity,duration){

	this.targetObject = obj;

	this.init(new Object(),'x',func,fromOpacity,toOpacity,duration);

}

var o = OpacityTween.prototype;

o.targetObject = {};

o.onMotionChanged = function(evt){

	var v = evt.target._pos;

	var t = this.targetObject;



	t.style['opacity'] = v / 100;

	t.style['-moz-opacity'] = v / 100;

	if(t.filters) t.style.filter = 'alpha(opacity='+v+')';

}