Jquery Buttons - How to show disabled state

Question

I am using Jquery buttons (http://jqueryui.com/demos/button/) for my UI. I would like to know how I can show a disabled state. Show the button as greyed out or something, you know how when you post a form on some sites the submit button shows as disabled.

Also is there anyway to display an active state???

This is my code:

 $(".commentsbutton").button({icons: { primary: 'ui-icon-comment'}}); 

<a href="javascript:void[0]">Comments</a>

Help is much appreciated.

UPDATE:

Answer 1

You can disable the button via the disable method, like this:

$(".commentsbutton").button("disable");​​​​​​​​​​​​​

You can give it a try here, to re-enable later, just use the enable method, like this:

$(".commentsbutton").button("enable");​​​​​​​​​​​​​