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General Discussion

making a mouseover effect on sprite sheet.

What is the best way to add a rollover effect to a button on a sprite sheet similar to http://test.gumgum.com/variable-size-ad/#ggad=F1P5ZLy2gTziyYZMQ0pdFHiSjZbIS0Twfm2aWxNY00JCBl7J4duHYJzhx0aaEWfj (disable add blocker) . How would I be able to do this from a sprite sheet?

The actual instruction is: * Using Photoshop or another image editing software, modify these graphics so that they are a css sprite with a rollover state. This can be the button lighting up, or a color change or other visible cue