(x1, y1, x2, y2) + (x3, y3) x1 and y1 are the coordinates of the top-left corner of the item. x2 and y2 are the coordinates of the bottom-right corner of the item. x3 and y3 are the coordinates of the "mouse over" image's top-left corner (usually outside the main graphic). This graphic is copied onto the normal coordinates when the mouse is over the item.