Show pictures when scrolling over the mouse

Hi,

It is possible this: I have a spreadsheet with two icons or figure and I want that every time I scroll the mouse over icon1 it shows picture1 and every time i scroll the mouse over icon2 it shows picture2. Also the pictures must be hidden so the person could not see the pictures only when he or she scrolls the mouse over any of the icons..

Could somebody help me with a code for this.

Thank you