Comment received from others caused us to look closely at the navbars we used ( based on Biztech.

The 1st level bar is 3D in appearance but the 2nd level is 2D and appears to be a simple background and foreground text colour and not have a related set of images ( gifs ) when exported. Further inspection of the other styles provided by Webstyle 4 showed this to be general, for both vertical and horizontal navbars.

Shouldn't Webstyle be able to generate GIFs for 2nd and successive levels of navbar menuitem and associated scripts?