Template:HoverImage


 * image-up: the top image file link.
 * image-down: the bottom image file link.
 * width: the width of the images (the default is 120px).
 * link: a link when pressing the button.
 * title: a title that will appear when hovering above the button.

Hide bottom image
In order to hide the bottom image, and only show it when hovering above the top image, add another parameter: |hidebottom= true However, it will not be displayed this way in editing mode.

Source