Rollover Illusions

I'll show you how to set up a rollover in photoshop and imageready, and we'll use this optical illusion tutorial. Here's mine Stare at the dot for 30 seconds, then move your mouse into the picture without moving your eyes from the dot. The picture will be in color until you move your eyes or the mouse. Don't forget the method to center the dot on the screen, as well as the step in imageready to create the rollover files. You will not be able to post the html files here, so I'll give instructions on how to turn this in in class.