Find out added swf from a document

I am adding multiple flash objects(swf) in HTML. When I try to find any of these objects (using 'document[swf_id]'), the browser returns 'null' unless the object of interest is acted upon. (Implicitl开发者_如何学Goy as I understood, I would always get 'null' if I have interacted with none of the objects).

Can somebody help me to know the reason? Am I missing something or is it a normal behaviour?

Thanks for your time.

SachinJadhav.

PS: I am using ExtJS with its media library.

---

Ok, this is not the best place for yours question. My way is add swf by SWFObject. I give them name and later looking using JS in DOM.

Better ask JavaScript Gurus ;)