How do you set the ID of a symbol when you dynamically add it to the stage?

I'm using this to try to give the symbol an ID:

s.setVariable("id", data[i].title);

The problem is that I'm trying to hide all the symbols later on a button click. I can't figure out how to hide them. I tried using Firefox to inspect the divs in the browser, but they all show as:

id="Stage_92"

id="Stage_93"

id="Stage_94"

etc.

Any help would be appreciated.