CSS Attribute selector when an attribute is not set (or how do I only select non disabled input[type="text"])

I'm using JQuery to try to select the textboxs on a form that are not disabled. My efforts have开发者_如何学C been fruitless since I don't know how to select all the input[type="text"] but also are not set to disabled.

result so far:

$('#signature INPUT[type="text"]');

Try this:

$('#signature INPUT[type="text"]:not(:disabled)');

Try this:

$('#signature input:text[disabled!=disabled]');

In english, find all input elements inside #signature which are of type text and which do not have their disabled attribute set to disabled.