Image previewArea on mouse over

function previewLoaded(e:Event):void
{

    var flashmo_tn_bm:Bitmap = Bitmap(e.target.content);

     flashmo_tn_bm.smoothing = true;
    
     previewArea.name = "previewArea"

    var previewArea:MovieClip = new MovieClip();
    var dispObject: DisplayObject = getChildByName( "previewArea" );

    previewArea.addChild(flashmo_tn_bm);
    addChild(previewArea);

    while (previewArea.numChildren)

     { previewArea.removeChildAt(0); };
}

If I use that coding and change  { previewArea.removeChildAt(0); }; to something like  { previewArea.removeChildAt(1); }; once I mouse over an area the first slide of the thumbnail changes into the preview images that I want. I think we are almost there. I just need to find a way to not have it load inside of the thumbnail slider and into the previewArea.

Here is the full code. It's very long.. But I did what you said but it doesn't says that it doesn't recognize the previewArea then

import caurina.transitions.Tweener;

slider_info.text = "loading data...";
link_title.text = "";
link_description.text = "";

var folder:String = "thumbnails/";
var start_from:Number = 0;
var no_of_tn:Number = 5;
var i:Number;
var tn:Number = 0;
var current_no:Number = 0;
var tween_duration:Number = 0.8;    // seconds
var total:Number;
var flashmo_xml:XML;
var flashmo_tn_list = new Array();
var thumbnail_group:MovieClip = new MovieClip();

this.addChild(thumbnail_group);
thumbnail_group.mask = slider_mask;

function load_gallery(xml_file:String):void
{
    var xml_loader:URLLoader = new URLLoader();
    xml_loader.load( new URLRequest( xml_file ) );
    xml_loader.addEventListener(Event.COMPLETE, create_thunbnail_slider);
}

function create_thunbnail_slider(e:Event):void
{
    flashmo_xml = new XML(e.target.data);
    total = flashmo_xml.thumbnail.length();

    for( i = 0; i < total; i++ )
    {
        flashmo_tn_list.push( {
            filename: flashmo_xml.thumbnail.filename.toString(),
            title: flashmo_xml.thumbnail.title.toString(),
            description: flashmo_xml.thumbnail.description.toString(),
            url: flashmo_xml.thumbnail.url.toString(),
            target: flashmo_xml.thumbnail.target.toString()
        } );
    }
    load_tn();
}

function load_tn():void
{
    var pic_request:URLRequest = new URLRequest( folder + flashmo_tn_list[tn].filename );
    var pic_loader:Loader = new Loader();
   
    pic_loader.load(pic_request);
    pic_loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, tn_progress);
    pic_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, tn_loaded);
    tn++;
}

function tn_progress(e:ProgressEvent):void
{
    slider_info.text = "loading thumbnail... " + tn + " of " + total;
}

function tn_loaded(e:Event):void
{
    if( tn < total )
        load_tn();
    else
        slider_info.text = "";

    var flashmo_tn_bm:Bitmap = new Bitmap();
    var flashmo_tn_mc:MovieClip = new MovieClip();
   
    flashmo_tn_bm = Bitmap(e.target.content);
    flashmo_tn_bm.smoothing = true;
   
    flashmo_tn_mc.addChild(flashmo_tn_bm);
    flashmo_tn_mc.name = "flashmo_tn_" + thumbnail_group.numChildren;
    flashmo_tn_mc.buttonMode = true;
    flashmo_tn_mc.addEventListener( MouseEvent.MOUSE_OVER, tn_over );
    flashmo_tn_mc.addEventListener( MouseEvent.MOUSE_OUT, tn_out );
    flashmo_tn_mc.addEventListener( MouseEvent.CLICK, tn_click );
    flashmo_tn_mc.x = thumbnail_group.numChildren * 150;
   
    thumbnail_group.addChild( flashmo_tn_mc );
}
function previewLoaded(e:Event):void
{
   
    var previewArea:MovieClip = new MovieClip();
    previewArea.addChild(flashmo_tn_bm);
    trace(this);
    trace(this.getChildByName('previewArea'));
    while (previewArea.numChildren) { previewArea.removeChildAt(0); };
    var flashmo_tn_bm:Bitmap = Bitmap(e.target.content);
    flashmo_tn_bm.smoothing = true;
    var pic_request:URLRequest = new URLRequest('fullpreviewimages/' + flashmo_tn_list[current_no].filename );
    var pic_loader:Loader = new Loader();
}

function tn_over(e:MouseEvent):void
{
    var mc:MovieClip = MovieClip(e.target);
    current_no = parseInt(mc.name.slice(11,13));
    Tweener.addTween( mc, { alpha: 0.5, time: tween_duration, transition: "easeIn" } );
   
    link_title.text = flashmo_tn_list[current_no].title;
    link_description.text = flashmo_tn_list[current_no].description;
   
    var pic_request:URLRequest = new URLRequest('fullpreviewimages/' + flashmo_tn_list[current_no].filename );
    var pic_loader:Loader = new Loader();

    pic_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, previewLoaded);
    pic_loader.load(pic_request);
}

function tn_out(e:MouseEvent):void
{
    var mc:MovieClip = MovieClip(e.target);
    current_no = parseInt(mc.name.slice(11,13));
    Tweener.addTween( mc, { alpha: 1, time: tween_duration, transition: "easeOut" } );
   
    link_title.text = "";
    link_description.text = "";
}

function tn_click(e:MouseEvent):void
{
    var mc:MovieClip = MovieClip(e.target);
    current_no = parseInt(mc.name.slice(11,13));
    navigateToURL( new URLRequest( flashmo_tn_list[current_no].url ),
                                flashmo_tn_list[current_no].target );
}

function move_slider():void
{
    if( total - start_from < no_of_tn )
        start_from = total - no_of_tn;
    if( start_from < 0 )
        start_from = 0;
       
    Tweener.addTween( thumbnail_group, { x: - start_from * 150,
                      time: tween_duration, transition: "easeInOutQuart" } );
}

flashmo_previous.addEventListener( MouseEvent.CLICK, move_left );
flashmo_next.addEventListener( MouseEvent.CLICK, move_right );

function move_left(e:MouseEvent):void
{
    start_from -= no_of_tn;
    move_slider();
}

function move_right(e:MouseEvent):void
{
    start_from += no_of_tn;
    move_slider();
}