how to add button to reduce and to increase the spped of interval in action script 2.0 - actionscript-2

Question

I have a code with which i can fetch image through internet ... I have completed it. I have to add to button , one to increase and one to reduce the interval ... in action script 2.0
import mx.transitions.*;
import mx.transitions.easing.*;
my_pb.mode = "manual";
this.createEmptyMovieClip("img_mc", 999);
var my_mcl:MovieClipLoader = new MovieClipLoader();
var mclListenerbject = new Object();
mclListener.onLoadStart = function(target_mc:MovieClip) {
my_pb.label = "loading: "+target_mc._name;
};
mclListener.onLoadProgress = function(target_mc:MovieClip, numBytesLoaded:Number, numBytesTotal:Number) {
var pctLoaded:Number = Math.ceil(100*(numBytesLoaded/numBytesTotal));
my_pb.setProgress(numBytesLoaded, numBytesTotal);
};
var number:Number = 2000;
var myInterval = setInterval(testInterval, number); //
function testInterval() {
my_mcl.addListener(mclListener);
my_mcl.loadClip("http://google.com/l5", img_mc);
}
i can create 2 button but there are some error...

Answer 1

If you want change the interval of the setInterval function, you have to clear it and then use the function with the new interval value, like this :
var delay:Number = 2000;
var interval = setInterval(on_repeat, delay);
function on_repeat() {
// instructions
}
fast.onPress = function(){
clearInterval(interval);
interval = setInterval(on_repeat, delay - 1000);
}
slow.onPress = function(){
clearInterval(interval);
interval = setInterval(on_repeat, delay + 1000);
}
But, as #Raptor has said, I recommend you to use ActionScript 3 instead of the old ActionScript 2.
For example, the code above can simply be replaced by a Timer object like this :
var delay:int = 2000;
var timer:Timer = new Timer(delay);
timer.addEventListener(TimerEvent.TIMER, function(e:TimerEvent):void {
// instructions
})
timer.start();
fast.addEventListener(MouseEvent.CLICK, function(e:MouseEvent):void {
timer.delay = delay - 1000;
})
slow.addEventListener(MouseEvent.CLICK, function(e:MouseEvent):void {
timer.delay = delay + 1000;
})
Hope that can help.

Answer 2

var current_loader:Number = 1;
var current_img:Number = 0;
this.createEmptyMovieClip('img_01', 999);
this.createEmptyMovieClip('img_02', 998);
img_01._x = img_01._y=img_02._x=img_02._y=20;
var loader:MovieClipLoader = new MovieClipLoader();
var listener:Object = new Object();
listener.onLoadStart = function(target_mc:MovieClip) {
};
listener.onLoadProgress = function(target_mc:MovieClip, numBytesLoaded:Number, numBytesTotal:Number) {
};
listener.onLoadComplete = function(target_mc:MovieClip) {
if (target_mc._name == 'img_01') {
img_02._visible = false;
} else {
img_01._visible = false;
}
};
var delay:Number = 2000;
var interval = setInterval(load_image, delay);
function load_image() {
loader.addListener(listener);
loader.loadClip("http://google.com/latimage.php?", _root['img_0'+current_loader]);
current_loader = current_loader == 1 ? 2 : 1;
current_img = current_img == images.length-1 ? 0 : current_img+1;
}
slow.onRelease = function() {
interval = setInterval(load_image, delay+1000);
trace(interval);
};
fast.onRelease = function() {
clearInterval(interval);
interval = setInterval(load_image, delay-1000);
trace(interval);
};
image_load();