[FMX] Functions

I have a portfolio with six tumpnails. I rescale the tumps depending on wich on was pressed with the following AS:
[AS]function scaleTump (clip, wijd, hoog, speed){
clip.onEnterFrame = function(){
var eindWijd = wijd - this._width;
this._width += eindWijd / speed;
var eindHoog = hoog- this._height;
this._height += eindHoog / speed;
}
}
for (var i in this) {
if (this*.name.substr(0, 4) == "btn") {
this*.onRelease = function() {
scaleTump(this, 380, 271, 4);

	};
}

}[/AS]

Clicking on one of the tumps, will rescal that tump to 380 X 271. What I want to accomplish now is that the other 5 tumpnails are going easing to alpha 0. Is it possible to integrate that in mine script?