This is similar to the Topic I broke this board in with, except now I need to cause a page to render in the Iframe rather than a popup.
For instance, if you punch the url in the address bar to the page supposed to occupy an Iframe (or a search engine spiders it without your knowing), the page launches the page supposed to contain it.
Dunno why I'm drawing a blank on this. The code for the forced popup should be enough of a clue. I just suck at javascirpt, I guess.