CSS Sprite Map Generator for background-image

So yesterday I thought it would be useful to have a tool that generates CSS classes based on defined slices of an image.  There are tools out there that do this but I wanted to be able to custom tweak it to do what i wanted and output things a certain way.  So I made one.  It's very rough around the edges and definitely read the instructions before using as I made it in an afternoon, but check it out and feel free to add to it or change it to your liking.

CSS Sprite Map Generator