Sorry, further research shows the work-around does not work. Apparently, both :enabled and :disabled are always false (I have no explanation for this). My testing was done on Firefox 3.6.10.

New workaround:

// Get the title of the first stylesheet that is not disabled
$("link[rel~='stylesheet'][title]").each(function(index) {
   if (!this.disabled) {
      title = $(this).attr("title");
      return false;
   }
});

Yeah, I wonder if we're asking for trouble by not defining :enabled as !:disabled (or vice-versa) and having the two be asymmetrical:

enabled: function(elem){
  return elem.disabled === false && elem.type !== "hidden";
},
disabled: function(elem){
  return elem.disabled === true;
},

Any DOM element without a Boolean

disabled

property will fail both tests. The API docs vaguely warn about this, and say "input:disabled" should be used, so we could just clarify that warning and say that these two selectors are only intended to be used with inputs:

http://api.jquery.com/disabled-selector/

That's why I don't understand why :disabled isn't working in my case. <link> tags DO appear to have a disabled property (when examined in FireBug), so it seems reasonable that these selectors could be used.

The

link

element does not have a

disabled

*property*:

http://www.w3.org/TR/html401/struct/links.html#h-12.3

If you are trying to set a non-standard *attribute* on the link element via

.attr()

that is not the same thing.

So how are you setting the disabled property on your link elements?

What I'm doing is running through the link tags in the DOM to see which named <link> tags are enabled and saving that value in a cookie in order to remember the user's style sheet selection. I'm not changing the disabled attribute myself right now. The user can change it in Firefox by using the View > Page Style menu items to set which alternate style sheet is active.

I had planned on getting the title via this, but it doesn't work right now because of the :enabled selector:

$("link[rel~='stylesheet'][title]:enabled").eq(0).attr("title")

See http://www.alistapart.com/stories/alternate/

This page says:

There is a w3c specified DOM Level 2 attribute, “disabled,” that is set to false when a style sheet is applied to the document.

If you're hitting problems everywhere then this is also failing in the browser's querySelectorAll engine - and I don't think that that's something that we're going to try and override and "fix".