ActionScript 2.0 Language Reference - Adobe Help and Support

Example 2: The following example is similar to the first, except that it calls
clearInterval() before setInterval(). This can help prevent unwanted loops and is
especially important in event-based systems where the initiating script can be executed
multiple times before any particular interval has been cleared.
var intervalId:Number;
var count:Number = 0;
var maxCount:Number = 10;
var duration:Number = 20;
function executeCallback():Void {
trace("executeCallback intervalId: " + intervalId + " count: " + count);
if(count >= maxCount) {
clearInterval(intervalId);
}
count++;
}
function beginInterval():Void {
if(intervalId != null) {
trace("clearInterval");
clearInterval(intervalId);
}
intervalId = setInterval(this, "executeCallback", duration);
}
beginInterval();
beginInterval();
beginInterval();
Example 3: The following example shows how to pass a custom argument to the function
that is being called.
var intervalId:Number;
var count:Number = 0;
var maxCount:Number = 10;
var duration:Number = 20;
var colors:Array = new Array("red",
Global Functions 101