function Delegate() {}
Delegate.create = function (o, f) {
	var a = new Array() ;
	var l = arguments.length ;
	for(var i = 2 ; i < l ; i++) a[i - 2] = arguments[i] ;
	return function() {
		var aP = [].concat(arguments, a) ;
		f.apply(o, aP);
	}
}
function Parallel(){
	this.children = new Array();
	this.numChildren = 0;
	this._listeners = new Array();
	this.addListener(this);
}
var s = Parallel.prototype;
s.endObject = new Object();
s.addChild = function(tween){
	this.children.push(tween)
	this.numChildren++;
}
s.start = function(){
	this.play();
	this.broadcastMessage('onMotionStarted', {target:this, type:'onMotionStarted'});
}
s.play = function(){
	for(var u = 0; u < this.numChildren; u++){
		if(u==(this.numChildren-1)){
			this.endObject = new Object();
			this.endObject.onMotionFinished = Delegate.create(this, this.end);
			this.children[u].addListener(this.endObject);
		}
		this.children[u].start();
	}
}

s.end = function(){
	this.children[this.numChildren-1].removeListener(this.endObject);
	this.broadcastMessage('onMotionFinished', {target:this, type:'onMotionFinished'});
}
s.stop = function(){
	this.enumAction('stop');
	this.broadcastMessage('onMotionStopped', {target:this, type:'onMotionStopped'});
	}
s.rewind = function(){
	this.enumAction('rewind');
	}
s.fforward = function(){
	this.enumAction('fforward');
	}
s.resume = function(){
	this.enumAction('resume');
	this.broadcastMessage('onMotionResumed', {target:this, type:'onMotionResumed'});
	}
s.yoyo = function(){
	this.enumAction('yoyo');
	}


s.enumAction = function(action){
	for(var u = 0; u < this.numChildren; u++){
		this.children[u][action]();
	}
}

s.addListener = function(o){
	this.removeListener (o);
	return this._listeners.push(o);

}
s.removeListener = function(o){
	var a = this._listeners;	
	var i = a.length;
	while (i--) {
		if (a[i] == o) {
			a.splice (i, 1);
			return true;
		}
	}
	return false;
}
s.broadcastMessage = function(){
	var arr = new Array();
	for(var i = 0; i < arguments.length; i++){
		arr.push(arguments[i])
	}
	var e = arr.shift();
	var a = this._listeners;
	var l = a.length;
	for (var i=0; i<l; i++){
		if(a[i][e])
		a[i][e].apply(a[i], arr);
	}
}