addEventListener

[tariqm]

Try this:

I explain everything in the comments, havn't tested it though, so not sure about it.

private function bitmapLoader(ImageTxt:String, Image_x, Image_y ) {
    var loader:Loader = new Loader();
    var urlReq:URLRequest = new URLRequest("images/category/"+ImageTxt);
    loader.load(urlReq);
    loader.x=  Image_x;
    loader.y=  Image_y+20;
    addChild(loader);
    var container:Sprite = new Sprite();
    addChild(container);
    var rect:MovieClip = new MovieClip();//changed rect to a movieclip so I can dynamically add a user defined String that will hold ImgTxt
    rect.imgTxt=ImageTxt;//attach the string to the movieclip
    rect.graphics.lineStyle(0);
    rect.graphics.beginFill(0xFF0000);
    rect.graphics.drawRect(Image_x, Image_y+20, 100, 75);
    rect.graphics.endFill();
    container.addChild(rect);
    rect.addEventListener("click", onClick); // THIS CALLS THE FUNCTION CALLED onClick
    rect.buttonMode = true;
    rect.addChild(loader);
    rect.filters = [ new DropShadowFilter() ];
}

private function onClick(event:MouseEvent):void {
    //event.currentTarget==the MovieClip(rect) that is clicked on
    
    //then access that dynamically created variable call imgTxt I created in the BitmapLoader function
    trace(event.currentTarget.imgTxt);
}