This script adds zoom effect to images on your page. Click on the pictures on this page to see the effect in action
Then modify your images slightly like this:
<img src="images/image1.jpg?url=images/image1_big.jpg" class="dg-picture-zoom">, i.e. by specifying path to large picture in the "src" and by assigning your pictures to the css class "dg-picture-zoom"