Since iframe is being deprecated anyway, why not go quirks? Forcing quirks mode with no DOCTYPE on the page, you should be able to do this:
HTML Code:
<iframe src="whatever.htm" width="100%" height="100%" frameborder="0" scrolling="auto">
<a href="whatever.htm">Whatever</a>
</iframe>
That should at least get you part of the way. Removing scrollbars from the top page with:
Code:
html, body {
overflow:hidden;
}
or some such thing might be nice too.
You should be left with an iframe that takes up the entire space of the window with scrollbars (if any) that scroll to various places on the external page.
Untested
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