On this page "Captions" I have used Jquery script from http://jqueryui.com/. A client requested text faded in over the top of images. This is my practice area. I actually faded one image over the other, the first image to be the primary image the second the required text. I will use the alt tags and picture names to assist in the SEO function.
Notice the single image of the Jeepney in the very bottom. This is a simple CSS 'hover' effect. It gets the job done, but with no smooth transistion.