I don't know if there is a specific function you can use to do that in dreamweaver but I bet there are some free javascripts out there you can download and configure to rotate pictures.
In fact, can download this program called "Magic Image"
http://webscripts.softpedia.com/scri...ion-39901.html
I actually used to use that on this forum with the banners on the right hand side. It was a javascript code that you configured and you could tell it how long to display each image. It's really for banners but you can do it for images too.