IE7 removeAttr not functioning properly

[laurence.hoess@…]

Version: jQuery 1.6.2 (1.6.1 worked fine; jQuery Edge shows the same problem)

Browser: IE7 (Testing with IE8 in IE7 Mode) Works in FF 5.0.1 and IE8.

OS: Windows XP

Test Steps:

1. Using the test case at  http://jsfiddle.net/4erKM/14/

2. Open IE8, hit F12, select Browser Mode: IE7.

3. Select DACUM, a Duty, Task, and Step menus should appear with Task and Step menus disabled. Selecting a Duty should enable the Task menu, selecting a Task should enable the Step menu. However in IE7 those menus remain disabled.

This appears to be related to #9576.

Tried the .prop('disabled', false) workaround but that didn't resolve the problem.

Sample:  http://jsfiddle.net/4erKM/14/

[dmethvin]

That is a lot of code, but basically do not do this in script:

$("#duty").attr("disabled","disabled");
$("#task").removeAttr("disabled");

Instead do this:

$("#duty").prop("disabled", true);
$("#task").prop("disabled", false);

[rwaldron]

Duplicate of #9927.