In CS4, the "Insert | Image Objects | Navigation Bar" command could be used to create a navigation bar in which "up image" and "over image" buttons could be placed to give a rollover effect when positioning the mouse pointer over each button. How do you do this in CS5? The command no longer exists....
Deprecated by Adobe in CS5 since the code was so antiquated.
Adobe recommends using Spry.
I recommend investing in Project Seven commercial DW extensions: