clone(events) method loses defaultValue on IE

[mikesamuel]

​http://docs.jquery.com/Manipulation/clone repairs problems with Node.cloneNode().

But some information not visible via innerHTML is lost.

The attached file should show original. value=changed original.defaultValue=initial

clone. value=changed clone.defaultValue=initial

but on IE6 shows

original. value=changed original.defaultValue=initial

clone. value=changed clone.defaultValue=changed

This likely also a problem for defaultSelected and defaultChecked. To test this in practice, create a form, change the contents of text input, click radio buttons, checkboxes, and select lists. Then close the form. If the bug is fixed, reset()ing the original and clone should return them to a similar state.

[mikesamuel]

HTML testcase

[mikesamuel]

I seem to have mangled the expected and actual output.

Expected:

original.       value=changed
original.defaultValue=initial
   clone.       value=changed
   clone.defaultValue=initial

On IE 6:

original.       value=changed
original.defaultValue=initial
   clone.       value=changed
   clone.defaultValue=changed

[snover]

Duplicate of #3879.