[udaaff]

var cont:MovieClip = createEmptyMovieClip("cont", getNextHighestDepth());

var mclListener:Object = new Object();
mclListener.onLoadInit = function(target_mc:MovieClip) {
    trace("Высота картинки: " + target_mc._height)
}

var image_mcl:MovieClipLoader = new MovieClipLoader();
image_mcl.addListener(mclListener);
image_mcl.loadClip("targetPath", cont);