Bradley's got a lot of stuff going on. (Impressive site!) Which are you trying to do?
Is the slideshow in some JS that you neither wrote nor understand? Writing a slideshow is a good beginner's JS project.
Try this in HTML (no JS). Put up a page with a lovely image. Create a second div, over the image. Put some text into div 2. If the image comes first in the HTML, it will be painted first. (That implies that the second image is painted over it.) If you DO NOT use any background in the second div, the text will be pained over the image.
My site begins with a div that says Welcome! in the center. The Welcome! fades away (5 second cheshire cat act). You might want to steal some of my fade code - it solves ugly cross-browser issues. www.MartinRinehart.com.