CSS Smart Image Enlarger
This versatile CSS image enlarger lets you display image thumbnails that resize to their original dimensions when the mouse rolls over them. Only one image is needed in each case.

CSS Popup Image Viewer
Enable arbitrary links or image thumbnails to pop up an enlarged (different) image onMouseover by using this CSS code. With the help of CSS's ":hover" pseudo class, combined with relative and absolute positioning, the enlarged images are simply included on the page as normal HTML, "popping" up on demand.

CSS Image Gallery
This is a purely CSS based image gallery that displays larger versions of thumbnail images dynamically when the mouse hovers over them. A rich HTML caption can be added to the enlarged image, and every aspect of the Image Gallery exists as plain HTML on the page.

Highlight image hover effect (opacity or borderize)
The first example changes the opacity of any image link when the mouse moves over it using the "hover:" pseudo class of CSS. Note the two different properties used to specify opacity in CSS below. In IE 5.5+, the "filter" property is used (range: 0-100), and in Firefox, "-moz-opacity" (range: 0-1). Both properties are proprietary.

Floating image with no text wrap
This example shows how to float images (or any content) so that the adjacent text does not wrap around it.