How I remove previous MC created with createmovieClip() and attachMovie()

Question

Hello.
i have another problem today, :-)
my little application contain a combobox and a MC "filmstrip" in my _root. the combobox work with an xml file containing links to other xml files. Inside my MC "filmstrip" i have a script loading with a for loop the xml file selected in the combobox on the _root .
In this loop i createEmptyMovieClip an attachMovies with the data  of the xml selected.
evrything works exept that evrytime i change my selection in the combobox it load the data  on top of the previous load.
I would like to delete  the previous load before load the new one... if someone can help me???
On my scene 1st frame i have only a code for scroll the movieclip filmstrip but i think is not nescessary that i show it.
here is the code inside the MC fimlstrip (sorry but i put all the code). i attach an example aswell
var link1:Array = new Array();
var url:String;
var theUrl:String;
var whoOn:Number;
whoOn = 1;
//load the  xml containing the link for T.Load() function
    var x:XML = new XML();
    x.ignoreWhite = true;
x.onLoad = function(success) {
        var photos:Array = this.firstChild.childNodes;
        for (i=0; i<photos.length; i++) {
            link1.push(photos[i].attributes.link1);
        url = link1[whoOn];
        theUrl = url;
        _root.filmstrip.Tload(theUrl);
        _root.lengthscroll(theUrl);
    x.load("category.xml");
//create the Listener object
var cbListener:Object = new Object();
//create tee change function
cbListener.change = function(event_obj:Object) {
    if (_root.select.selectedItem.label == "Last updated") {
        whoOn = 0;
    } else if (_root.select.selectedItem.label == "Special") {
        whoOn = 1;
    trace(_root.select.selectedItem.label);
    url = link1[whoOn];
    trace("url is "+_root.filmstrip.url);
    theUrl = url;
    _root.lengthscroll(theUrl);
    Tload(theUrl);// set the url to load in the T.load()
_root.select.addEventListener("change",cbListener);
function Tload(theUrl) {//function that load the url selected in the combobox
    var T:XML = new XML();
    T.ignoreWhite = true;
    var thumb:Array = new Array();//create array
    var thTxt:Array = new Array();
    var DescTXT:Array = new Array();
    var priceTXT:Array = new Array();
    var linkTXT:Array = new Array();
    var Modelink = "http://www.windi.no/catalog/advanced_search_result.php?keywords=";//1st part of the link for when you click on the tumbnails
    var Spc = 0;// space between thumbnail default 0
    var posX = 0;// thumbnail position x
    var posY = 0;//thumbnail 1st position y
    var tl:MovieClip = this;
    var whoIsOn:Number;
    whoIsOn = 0;
    T.onLoad = function(xml) {
        var photos:Array = this.firstChild.childNodes;
        //loop the php Xml for the thumbnail
        for (i=0; i<photos.length; i++) {
            var Num = i+1;
            var WhoIsOn = Num;
            var TXTCLIP = "TXTCLIP"+Num;
            var TXTCLIP2 = "TXTCLIP2"+Num;
            var TXTCLIP3 = "TXTCLIP3"+Num;
            var Clp_name = "clip"+Num;
            var Bt_name = "Bt"+Num;
            var container = (container+Num);
            //put each attributs of thumbnail for each photos node
            thTxt.push(photos[i].attributes.thumbtext);
            thumb.push(photos[i].attributes.thumbnail);
            DescTXT.push(photos[i].attributes.thumbdesc);
            priceTXT.push(photos[i].attributes.thumbprice);
            linkTXT.push(photos[i].attributes.thumbmodel);
            _root.Text_Thumbnail(thTxt[whoIsOn]);
            _root.bigphotos.loadMovie(thumb[whoIsOn],1);
            var fullink = (Modelink+linkTXT[i]);//the 2nd part of the "Modelink"
            //display Tiles
            var TXT:MovieClip = tl.attachMovie("TXTCLIP", TXTCLIP, tl.getNextHighestDepth());
            TXT._x = posX+120;
            TXT._y = posY+Spc+13;
            TXT.titleTXT.text = thTxt[i];
            //desccription
            var TXT2:MovieClip = tl.attachMovie("TXTCLIP2", TXTCLIP2, tl.getNextHighestDepth());
            TXT2._x = posX+120;
            TXT2._y = posY+Spc+30;
            TXT2.titleTXT.text = DescTXT[i];
            // display prices
            var TXT3:MovieClip = tl.attachMovie("TXTCLIP3", TXTCLIP3, tl.getNextHighestDepth());
            TXT3._x = posX+120;
            TXT3._y = posY+Spc+90;
            TXT3.titleTXT.text = priceTXT[i];
            //display thumbnails
            var container:MovieClip = tl.createEmptyMovieClip(Clp_name, tl.getNextHighestDepth());
            container.loadMovie(thumb[i],1);
            container._yscale = 30;
            container._xscale = 30;
            container._x = posX;
            container._y = posY+Spc;
            //for the OnRelease function on the thumbnail
            var BT:MovieClip = tl.attachMovie("Btb", Bt_name, tl.getNextHighestDepth());
            BT._x = posX;
            BT._y = posY+Spc;
            BT.whoIsOn = i;
            BT.onRelease = function() {
                stopAllSounds();
                getURL((Modelink+linkTXT[this.whoIsOn]));//this is the link when you click on the thumbnail
            BT.onRollOver = function() {
                _root.Text_Thumbnail(thTxt[this.whoIsOn]);//display the title of the thumbnail by rolling over
                _root.whoIsOn = this.whoIsOn;
                _root.bigphotos.loadMovie(thumb[this.whoIsOn],1);//Display the poto of the thumbnail by rolling over
            BT.onRollOut = function() {
                _root.Text_Thumbnail("");
            Spc = Spc+160;//for the space betwen the clips           
    //load the xml file selected in the combobox
    trace("the url loaded is: "+theUrl);
    T.load(theUrl);//Load the url selected in the combobox

Answer 1

created a function for remove the movieClips bu it dont wotk :
var link1:Array = new Array();
var url:String;
var theUrl:String;
var whoOn:Number;
whoOn = 1;
//HERE MY FUNCTION
function reset_all() {
    _root.filmstrip.removeMovieClip();
//<---TO HERE
//load the  xml containing the link for T.Load() function in filmstrip movie clip the xml file
function loadCat() {
    var x:XML = new XML();
    x.ignoreWhite = true;
    x.onLoad = function(success) {
        var photos:Array = this.firstChild.childNodes;
        for (i=0; i<photos.length; i++) {
            link1.push(photos[i].attributes.link1);
        url = link1[whoOn];
        theUrl = url;
        _root.filmstrip.Tload(theUrl);
        _root.lengthscroll(theUrl);
    x.load("category.xml");
loadCat();
//create the Listener object
var cbListener:Object = new Object();
//create tee change function
cbListener.change = function(event_obj:Object) {
    if (_root.select.selectedItem.label == "Last updated") {
        whoOn = 0;
    } else if (_root.select.selectedItem.label == "Special") {
        whoOn = 1;
    trace(_root.select.selectedItem.label);
    url = link1[whoOn];
    trace("url is "+_root.filmstrip.url);
    theUrl = _root.filmstrip.url;
    _root.lengthscroll(theUrl);
    Tload(theUrl);// set the url to load in the T.load() function in filmstrip
_root.select.addEventListener("change",cbListener);
function Tload(theUrl) {//function that load the url selected in the combobox
    var T:XML = new XML();
    T.ignoreWhite = true;
    var thumb:Array = new Array();//create array
    var thTxt:Array = new Array();
    var DescTXT:Array = new Array();
    var priceTXT:Array = new Array();
    var linkTXT:Array = new Array();
    var Modelink = "http://www.windi.no/catalog/advanced_search_result.php?keywords=";//1st part of the link for when you click on the tumbnails
    var Spc = 0;// space between thumbnail default 0
    var posX = 0;// thumbnail position x
    var posY = 0;//thumbnail 1st position y
    var tl:MovieClip = this;
    var whoIsOn:Number;
    whoIsOn = 0;
    T.onLoad = function(xml) {
       reset_all(); /// HERE I APLY IT
        var photos:Array = this.firstChild.childNodes;
        //loop the php Xml for the thumbnail
        for (i=0; i<photos.length; i++) {
            var Num = i+1;
            var WhoIsOn = Num;
            var TXTCLIP = "TXTCLIP"+Num;
            var TXTCLIP2 = "TXTCLIP2"+Num;
            var TXTCLIP3 = "TXTCLIP3"+Num;
            var Clp_name = "clip"+Num;
            var Bt_name = "Bt"+Num;
            var container = (container+Num);
            //put each attributs of thumbnail for each photos node
            thTxt.push(photos[i].attributes.thumbtext);
            thumb.push(photos[i].attributes.thumbnail);
            DescTXT.push(photos[i].attributes.thumbdesc);
            priceTXT.push(photos[i].attributes.thumbprice);
            linkTXT.push(photos[i].attributes.thumbmodel);
            _root.Text_Thumbnail(thTxt[whoIsOn]);
            _root.bigphotos.loadMovie(thumb[whoIsOn],1);
            var fullink = (Modelink+linkTXT[i]);//the 2nd part of the "Modelink"
            //display Tiles
            var TXT:MovieClip = tl.attachMovie("TXTCLIP", TXTCLIP, tl.getNextHighestDepth());
            TXT._x = posX+120;
            TXT._y = posY+Spc+13;
            TXT.titleTXT.text = thTxt[i];
            //desccription
            var TXT2:MovieClip = tl.attachMovie("TXTCLIP2", TXTCLIP2, tl.getNextHighestDepth());
            TXT2._x = posX+120;
            TXT2._y = posY+Spc+30;
            TXT2.titleTXT.text = DescTXT[i];
            // display prices
            var TXT3:MovieClip = tl.attachMovie("TXTCLIP3", TXTCLIP3, tl.getNextHighestDepth());
            TXT3._x = posX+120;
            TXT3._y = posY+Spc+90;
            TXT3.titleTXT.text = priceTXT[i];
            //display thumbnails
            var container:MovieClip = tl.createEmptyMovieClip(Clp_name, tl.getNextHighestDepth());
            container.loadMovie(thumb[i],1);
            container._yscale = 30;
            container._xscale = 30;
            container._x = posX;
            container._y = posY+Spc;
            //for the OnRelease function on the thumbnail
            var BT:MovieClip = tl.attachMovie("Btb", Bt_name, tl.getNextHighestDepth());
            BT._x = posX;
            BT._y = posY+Spc;
            BT.whoIsOn = i;
            BT.onRelease = function() {
                stopAllSounds();
                getURL((Modelink+linkTXT[this.whoIsOn]));//this is the link when you click on the thumbnail
            BT.onRollOver = function() {
                _root.Text_Thumbnail(thTxt[this.whoIsOn]);//display the title of the thumbnail by rolling over
                _root.whoIsOn = this.whoIsOn;
                _root.bigphotos.loadMovie(thumb[this.whoIsOn],1);//Display the poto of the thumbnail by rolling over
            BT.onRollOut = function() {
                _root.Text_Thumbnail("");
            Spc = Spc+160;//for the space betwen the clips           
    //load the xml file selected in the combobox
    trace("the url loaded is: "+theUrl);
    T.load(theUrl);//Load the url selected in the combobox