[whatwg] Hacking away on forms ... (fwd)
lachlan.hunt at lachy.id.au
Sun Sep 10 06:40:24 PDT 2006
Dave Raggett wrote:
> You can reproduce my tests by pointing your browser at:
OK, I have the discovered the reason for the discrepancy in our results.
Apparently IE handles exactly the same markup differently depending
upon how it is added to the page.
If you load my test case  in IE, tests A through E are styled, but
test F isn't. This shows the following:
IE will only allow styling of elements with namespace prefixes that have
been either explicitly or implicitly declared.
There are two ways to explicitly declare a namespace in IE:
1. <html xmlns:foo="http://example.org/foo">
2. <?xml:namespace prefix = foo ns = "http://example.org/foo" />
In both cases, the URI may be omitted.
When a "Custom Tag" (the name Microsoft have given elements with
namespace prefixes in HTML) is added using either innerHTML or
document.write(), the PI that declares the namespace will be implicitly
generated using the prefix but with no actual namespace name.
This explains why I was getting different results using the Live DOM
Viewer because it uses innerHTML to copy the markup from the text box to
the rendering area. That means that IE was implicitly declaring the
namespace of all Custom Tags in my tests.
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