How do I reverse the colors of an image?

[brothercake]

I've got this image:



How do I make into a white button of the same intensity, and still on a white background? I have PS6, Fireworks and Illustrator for tools .. I just have no idea what to do .. "invert" isn't the same thing.

[mindlessLemming]

That button is a rectangle with a 20px corner radius, and a "bevel" layer effect, available in PS6.
I saved you the time, but had to make the button slightly off-white to show the highlight on the bottom-right corner.

Thanks again for your help w/ the accessibility stuff
Andrew

[brothercake]

Ta