[patch][ccla]IE: PermissionDenied exception in _Templated.js on window unload

[Douglas Hays]

Run the attached onunloadbug.html with any IE browser.
1) click the button to create a widget in the main window.
2) click the button to create a widget in the iframe.
3) click the button to destroy the iframe widget.
4) click the button to reload the iframe.
5) press the browser refresh button (or F5).
PermissionDenied? exception is thrown from the onunload handler in _Templated.js.

[Douglas Hays]

test file

[Douglas Hays]

test iframe source file

[Douglas Hays]

possible fix to avoid nodeType check on a different document's node

[bill]

Dijit doesn't support creating widgets into an iframe using dojo from the main document.

Having said that, this change looks harmless so I don't mind you putting it in.

[Douglas Hays]

(In [20582]) Fixes #10106. In the unload handler that empties the template cache, call dojo.destroy if the cached value is an object instead of referencing nodeType that can cause IE to throw an exception if the node's document has been reloaded. The cached value is either a simple string or a DOM tree (object). nodeType=1 was already checked before the cache was populated with the node object.