Function From AS2 to AS1

I have this Function:


var count:Number = 0;
var maxCount:Number = 300
var duration:Number = 500; 

function beginInterval() {
 if(intervalId != null) {
 clearInterval(intervalId);
 }
};

function executeCallback():Void {
mySender();
test++;
callbacker = "Callback" + test ;
};

beginInterval();
intervalId = setInterval(this, "executeCallback", duration);

It works in AS2 but not in AS1 … Does sumone know how i can rewrite this so it works in AS1???

thanx in advance

ChromeD