attr ("disabled", true [or false or 1 or 0]) does not work properly in IE

[marllos]

The attr ("disabled",true) or attr ("disabled",false), works with jquery 1.5.1 and IE8, but not working in jquery 1.6.2 and IE8. In other browsers are ok.

[timmywil]

Thanks for taking the time to contribute to the jQuery project! Please provide a reduced test case on ​http://jsfiddle.net that reproduces the issue experienced to help us assess your ticket.

Additionally, test against the jQuery (edge) version to ensure the issue still exists.

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​http://jsfiddle.net/xWkdg/

It works in IE8 Standards mode, but not in Quirksmode.

Go figure! ;)

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p.s. The input actually gets disabled/enabled, but if you notice after it is re-enabled the text in the input is gray as if it was still disabled.

[timmywil]

Duplicate of #9719.