To use the form all you need to do is to enter the address of both the original image to be displayed on your page and the one you want it replaced by when the mouse is moved over it. You also need to enter the width and height of th images (which should be the same for both) and alternate text to be displayed by those viewing the page with images turned off.
The next step is to copy the HTML for the various Image Tags and paste them as code into the body section of your web page where you want each image to appear. Unless you want all of the images to appear next to one another this will mean pasting each piece of HTML to a separate spot on your page.
This article written by Stephen Chapman, Felgall Pty Ltd.