:disabled Selector
jQuery(':disabled')Description: Selects all elements that are disabled.
As with other pseudo-class selectors (those that begin with a ":") it is recommended to precede it with a tag name or some other selector; otherwise, the universal selector ("*") is implied. In other words, the bare $(':disabled') is equivalent to $('*:disabled'), so $('input:disabled') should be used instead.
Example:
Finds all input elements that are disabled.
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<form>
<input name="email" disabled="disabled" />
<input name="id" />
</form>
<script>$("input:disabled").val("this is it");</script>
</body>
</html>
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