dojo.undo.browser test (dojo.io.bind() with bookmarking)
	
	See the Dojo Book entry for 
	
Back Button and Bookmarking.
		
	
This page tests the dojo.undo.browser back/forward integration with dojo.io.bind(),
	and dojo.undo.browser's bookmarking facility. For a back/forward test without bookmarking,
	see test_browser.html.
	
	The buttons that start with "XHR" use
	dojo.io.bind to do some XMLHTTPRequest calls for some test data, and they
	also define back/forward handlers, so dojo.io should use dojo.undo.browser
	add to history tracking.
	To test the bookmarking facility:
	
		- Click on one of the buttons below.
 
		- Save the resulting URL as a bookmark.
 
		- Close the browser window, or navigate to a different page.
 
		- Click on the bookmark to jump to that state in the page
 
	
	Other notes:
	
	
		- 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. The XML served back from the XHR tests will also not be properly
		created if served from local disk. 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), and only if changeUrl is NOT used (so it will not
		work for this test page, since it is using bookmarking -- changeUrl). 
		When changeUrl is used, Safari jumps all the way
		back to whatever page was shown before the page that uses
		dojo.undo.browser support.
 
		- Opera 8.5.3: Does not work.
 
		- Konqueror: Unknown. The latest may have Safari's behavior.