Help Finding Link URL in Nested SWFs

Question

Hello,
I have a "wrapper swf" that loads a remote flash player that in turn loads video preroll ads from various advertisers.
So my wrapper is the parent and the remote swf is a child and the video ad is a grandchild.
I am looking to capture the url that the grandchild will navigate to when clicked.
I am trying to trace it in the parent (wrapper) mouseUP and mouseDOwn event.
Is there a way to traverse ALL children until I get to the "bottom/last loaded" swf and get the URL?
I wish to save the url to a variable so I can launch the url in another player of my own as opposed to having it launch an external IE browser.
Thanks a million for any help!.

Answer 1

and that puts you back to the start of the issues i brought up before.  unless you have some specific knowledge of what's going on in those loaded swfs, you're not likely to find a solution.
if, however, you know all the swfs are loaded using loader class instances AND added to the display list directly (as opposed to adding a loader's content), you can use something like:
var lastURL:String;
lastLoadedURLF(MovieClip(root));
function lastLoadedURLF(mc:MovieClip):void{
    for(var i:int=0;i<mc.numChildren;i++){
        if(mc.getChildAt(i) is MovieClip){
            lastLoadedF(MovieClip(mc.getChildAt(i)));
        } else if(mc.getChildAt(i) is Loader){
            if(Loader(mc.getChildAt(i)).content){
                if(Loader(mc.getChildAt(i)).content is MovieClip){
                    lastURL = Loader(mc.getChildAt(i)).contentLoaderInfo.url;
                    lastLoadedURLF(MovieClip(mc.getChildAt(i)).content));