flash it2 hjelp

import flash.events.MouseEvent;

const UNDERFEMTEN= 60;
const OVERFEMTEN = 80

var alder:int = int(txtAlder.text);
var timer:Number = Number(txtTimer.text);

btnBeregn.addEventListener(MouseEvent.CLICK, beregn)


function beregn(evt:MouseEvent)
{

if (alder < 15)
{
var alder:Number = Number(txtAlder.text.replace(",", "."));
var timerIUka:Number = Number(txtTimer.text.replace(",", "."));
var iTimer:Number = UNDERFEMTEN
txtITimen.text = " " + iTimer.toFixed(1)

var iUka:Number = iTimer*timerIUka
txtIUka.text= " " + iUka.toFixed(1)

}
else  (alder >= 15)
{
// alder:Number = Number(txtAlder.text.replace(",", "."));
// timer:Number = Number(txtTimer.text.replace(",", "."));
// iTimer:Number = OVERFEMTEN
// txtITimen.text = " " + iTimer.toFixed(1)
}
}

//txtAlder
//txtTimer
//txtITimen
//txtIUka
//txtIMåneden
//btnBeregn