The problem seems to stem from it not processing the script result of preview.php. It should take this URL and give the same results (if you click on it), but doesn't:
It works fine on the main site (poliviews.com), but I do wrap it inside an Iframe.
At this point, I'll just admit it's probably my own lack of JavaScript knowledge and thank any who have at the very least taken a glance at it (and much thanks again to Ken).
If anyone has a suggestion, it's greatly appreciated. If not, that's cool too.
Thanks,
-Eric