jQuery: change icon to greyscale

I made a button widget in jQuery which displays an icon.

Now when I set the button do disabled, I'd like to have it greyed-开发者_开发问答out.

Is there a jQuery function to do this?

Thanks

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If you don't want to create another version of the image then you can try using CSS to reduce the opacity of the button so it appears faded, or overlay a semi-transparent grey DIV to give a greyed-out effect.

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http://www.alistapart.com/articles/sprites2/

Sprites are your answer.