Please how do I unload and hide an external image?

Question

I have been trying for a few hours now just to unload an image but I get an error when I try it which sais ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/removeChild()
at tester_fla::MainTimeline/ontester2ButtonClick()
I have 2 buttons on the stage the first one adds the image and is called tester_btn, the second (attempts) to unload and hide the image and is called tester2_btn
My code is as follows:
tester_btn.addEventListener(MouseEvent.CLICK,ontesterButtonClick);
function ontesterButtonClick(event:MouseEvent):void {
var myrequest:URLRequest=new URLRequest ("HomeLogo.png");
var myloader:Loader = new Loader();
myloader.load(myrequest);
myloader.contentLoaderInfo.addEventListener(Event.COMPLETE, imgLoaded);
function imgLoaded(event:Event):void{
addChild(myloader);
tester2_btn.addEventListener(MouseEvent.CLICK,ontester2ButtonClick);
function ontester2ButtonClick(event:MouseEvent):void {
var myrequest:URLRequest=new URLRequest ("HomeLogo.png");
var myloader:Loader = new Loader();
myloader.unload();
stage.removeChild(myloader);
Any help will be much appreciated!

Answer 1

whoa, you're creating a loader that's not accessible outside ontesterButtonClick and you're creating another locally defined loader with the same name that never gets added to the display list in ontester2ButtonClick and your nesting a named function.  all problems.  try:
try:
tester_btn.addEventListener(MouseEvent.CLICK,ontesterButtonClick);
var myloader:Loader = new Loader();
function ontesterButtonClick(event:MouseEvent):void {
     var myrequest:URLRequest=new URLRequest ("image");
     myloader.load(myrequest);
     myloader.contentLoaderInfo.addEventListener(Event.COMPLETE, imgLoaded);
     addChild(myloader);
function imgLoaded(event:Event):void {
          // do whatever
tester2_btn.addEventListener(MouseEvent.CLICK,ontester2ButtonClick);
function ontester2ButtonClick(event:MouseEvent):void {
     var myrequest:URLRequest=new URLRequest ("HomeLogo.png");
     myloader.unload();
     removeChild(myloader);