ColorTween.prototype = new Tween();
ColorTween.prototype.constructor = Tween;
ColorTween.superclass = Tween.prototype;

function ColorTween(obj,prop,func,fromColor,toColor,duration){
	this.targetObject = obj;
	this.targetProperty = prop;	
	this.fromColor = fromColor;
	this.toColor = toColor;
	this.init(new Object(),'x',func,0,100,duration);
	this.listenerObj = new Object();
	this.listenerObj.onMotionChanged = Delegate.create(this,this.onColorChanged);
	this.addListener(this.listenerObj);
}
var o = ColorTween.prototype;
o.targetObject = {};
o.targetProperty = {};
o.fromColor = '';
o.toColor = '';
o.currentColor = '';
o.listenerObj = {};
o.onColorChanged = function(){
	this.currentColor = this.getColor(this.fromColor,this.toColor,this._pos);
	this.targetObject[this.targetProperty] = this.currentColor;
}


o.getColor = function(start, end, percent)
{
	var r1=this.hex2dec(start.slice(0,2));
    var g1=this.hex2dec(start.slice(2,4));
    var b1=this.hex2dec(start.slice(4,6));

    var r2=this.hex2dec(end.slice(0,2));
    var g2=this.hex2dec(end.slice(2,4));
    var b2=this.hex2dec(end.slice(4,6));

    var pc = percent/100;

    r= Math.floor(r1+(pc*(r2-r1)) + .5);
    g= Math.floor(g1+(pc*(g2-g1)) + .5);
    b= Math.floor(b1+(pc*(b2-b1)) + .5);

    return("#" + this.dec2hex(r) + this.dec2hex(g) + this.dec2hex(b));
}

o.dec2hex = function(dec){return(this.hexDigit[dec>>4]+this.hexDigit[dec&15]);}
o.hexDigit=new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F");
o.hex2dec = function(hex){return(parseInt(hex,16))};