Clear loaded pictures in xml gallery to load another set

Question

i cannot figure how to unload my already populated xml gallery, before loading new content :
here the functions i want :
//following 2 functions will be called by a button :
// removes previously placed objects
function clearLoadedPictures():void {
// Load another ,xml to load new pictures set - ok : works fine
function LoadNewPictures():void {
        i_g = 0;
           // xml data
            var xml_gallery:XML                = new XML();
            var xml_gallery_List:XMLList        = new XMLList;
            // XML data loader...
            var xmlUrlReq:URLRequest   = new URLRequest("xml/gallery2.xml");// gallery2.xml will replace gallery.xml already loaded
            var xml_gallery_UrlLoader:URLLoader = new URLLoader(xmlUrlReq);
            xml_gallery_UrlLoader.addEventListener(Event.COMPLETE, xml_gallery_Complete);
            xml_gallery_UrlLoader.addEventListener(IOErrorEvent.IO_ERROR, xml_gallery_LoadFailed);
here the xml gallery code :
var _mc:item;
var total:int;
var i_g:int;
var id:int;
var btn_Gallery_Ready:Boolean;
var speedX:Number;
var spaceR:Number;
var img_gallery_Loader:Loader;
i_g = 0;
           // xml data
            var xml_gallery:XML                = new XML();
            var xml_gallery_List:XMLList        = new XMLList;
            // XML data loader...
            var xmlUrlReq:URLRequest   = new URLRequest("xml/gallery.xml");
            var xml_gallery_UrlLoader:URLLoader = new URLLoader(xmlUrlReq);
            xml_gallery_UrlLoader.addEventListener(Event.COMPLETE, xml_gallery_Complete);
            xml_gallery_UrlLoader.addEventListener(IOErrorEvent.IO_ERROR, xml_gallery_LoadFailed);
            bottom24.gallery.content_mc.addEventListener(MouseEvent.ROLL_OVER, startScroll);
            bottom24.gallery.content_mc.addEventListener(MouseEvent.ROLL_OUT, stopScroll); //
// xmlComplete function
        function xml_gallery_Complete(e:Event):void
        xml_gallery = XML(e.target.data); //
            xml_gallery_List = xml_gallery.item;  // <item> in gallery.xml
            total = xml_gallery_List.length();
            spaceR = xml_gallery.attribute("space"); // specified in gallery.xml file as is : <gallery space="119" speed="0.2">
            speedX = xml_gallery.attribute("speed");
            init_gallery();
        function xml_gallery_LoadFailed(e:IOErrorEvent):void {
            trace("Load Failed: " + e);
        function init_gallery()  //
            //bottom.gallery.content_mc.itemHolder_mc.
            _mc = new item(); //
            _mc.alpha = 0;
            //_mc.imgMask_mc.scaleY = 0;  // condition pour apparition des timbres ds la gallery - OLD
            _mc.imgMask_mc.alpha = 0; // condition pour apparition des timbres ds la gallery - NEW
            _mc.x = i_g * spaceR;
            _mc.btn.id = i_g;
            _mc.btn.mouseChildren = false;
            bottom24.gallery.content_mc.itemHolder_mc.addChild(_mc);
            Tweener.addTween(_mc, {alpha:1, time:0.8, transition:"easeOutExpo"});
            _mc.online_mc.alpha = 0; //invisible sans roll over
            if (xml_gallery_List[i_g].url != "")
                _mc.btn.buttonMode = true;
                _mc.online_mc.visible = true;
                btn_Gallery_Ready = true;
            else
                _mc.btn.buttonMode = false;
                _mc.online_mc.visible = false;
                btn_Gallery_Ready = false;
        var imgRequest:URLRequest = new URLRequest (xml_gallery_List[i_g].image); //
         img_gallery_Loader = new Loader(); // var imgLoader:Loader;
            img_gallery_Loader.load(imgRequest); //
            img_gallery_Loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, imgLoading);
            img_gallery_Loader.contentLoaderInfo.addEventListener(Event.COMPLETE, img_gallery_Complete);
            i_g++;
        function imgLoading(event:ProgressEvent):void // tiny preloader in bottom thumbs pics
    _mc.preloader_mc.width = Math.round(img_gallery_Loader.contentLoaderInfo.bytesLoaded / img_gallery_Loader.contentLoaderInfo.bytesTotal * 100);
        function img_gallery_Complete(event:Event):void
            _mc.imgHolder_mc.addChild(img_gallery_Loader);
            Tweener.addTween(_mc.imgHolder_mc, {_saturation:0.9, time:0.6});// desaturate scrolling thumbs
            //_mc.imgHolder_mc.alpha = 0.5; // test
            // apparition des timbres ds la gallery, ici fade in : - NEW
            Tweener.addTween(_mc.imgMask_mc, {"alpha":1, delay:i_g / 20, time:0.4, transition:"easeOutExpo"});// test
            // apparition des timbres ds la gallery, ici image apparait de haut en bas : - OLD
            //Tweener.addTween(_mc.imgMask_mc, {"scaleY":1, delay:i_g / 10, time:1, transition:"easeOutExpo"});
            // la ligne de preloader qui diminue vers la gauche :
            Tweener.addTween(_mc.preloader_mc, {"scaleX":0, delay:0, time:1, transition:"easeOutExpo"});
            _mc.btn.addEventListener(MouseEvent.ROLL_OVER, onMouseOver);
            _mc.btn.addEventListener(MouseEvent.ROLL_OUT, onMouseOut);
            _mc.btn.addEventListener(MouseEvent.CLICK, onMouseClick);
            if (i_g < total)
                init_gallery();
thanks

Answer 1

hi,
back to work,
then i used a loop in the first clear function:
var n:int = 0;
              while (n < xml_gallery_List.length() -1) {
                  bottom24.gallery.content_mc.itemHolder_mc.removeChildAt(n); //
                i++;
and it remove all my previously loaded pictures,but it throw me an error :
RangeError: Error #2006: The supplied index is out of bounds.
at flash.display: DisplayObjectContainer/removeChildAt()
it seems error come from the removeChildAt, but i can't figure out what's wrong
i've tried to replace removeChildAt(n); by removeChild(n); and the loop crash Flash software....
any suggestion ?