Inserting a <script src> header tag in subsequent JQM pages

Hi all,

I've been working with jQuery Mobile for a month now and am really liking it.

One thing I have not been able to figure out: how can I add a new javascript resource file (<script src="x.js">) in a web page *after* the initial page loads? I'm running different ad networks, Google Maps API, and my own JS and I don't want the whole shebang to have to load on the first page, especially since I don't need many of them right away.