Thanks for submitting a ticket!. In jQuery 1.6, a significant change was made to the way we handle getters and setters for attributes and as a part of this we introduced the idea of .prop() for accessing properties.

If you are using jQuery < 1.6 do this:

$foo.attr("disabled", value);

If you are using jQuery 1.6+:

$foo.prop("disabled", value); (eg. where value is true)

If you require more information about the differences between .prop() and .attr() you may find the following stackoverflow post useful: http://stackoverflow.com/questions/5874652/prop-vs-attr

Why was this marked invalid?

From[BLOG » JQUERY 1.6.1 RELEASED|http://blog.jquery.com/2011/05/12/jquery-1-6-1-released/]:

''Specifically, boolean attributes such as checked, selected, readonly, and disabled in 1.6.1 will be treated just as they used to be treated in jQuery versions prior to 1.6.''

It seems the blog is saying one thing and you are saying something completely different. I understand the "preferred" or "desired" methods, but at the same time, if the blog says "this will work the way it always has", well, then, I sort of expect it to.....will work the way it always has.

If the caller had used true or false then it would work, since that's the way many people used to do it -- treating the attribute like a property. The use of a boolean value is a clue that they want the old behavior, since only strings are valid attribute values.

#10056 is a duplicate of this ticket.

#10073 is a duplicate of this ticket.

#10430 is a duplicate of this ticket.

#10109 is a duplicate of this ticket.