This page tests the dojo.back back/forward code.
The buttons that start with "Link" on them don't use any dojo.xhr* calls,
just JS data already in the page.
- Don't test this page using local disk for MSIE. MSIE will not
create a history list for iframe_history.html if served from a file:
URL. Serve the test pages from a web server to test in that browser.
- Safari 2.0.3+ (and probably 1.3.2+): Only the back button works OK
(not the forward button).
- Opera 8.5.3: Does not work.
- Konqueror: Unknown. The latest may have Safari's behavior.