I'm patched, but having investigated the Styles controls (via
the "Styles" button on the FrameMaker - RoboHelp Style Mappings
dialog box) I think I may be barking up the wrong tree.
In the RH Style controls, there is no option to associate a
style with a drop-down hotspot. In a way this is no surprise,
because dropdown hotspots are not an effect you can associate with
a single paragraph. You need to set up a <div> that defines a
dropdown text area. In WWP, if an FM paragraph tag was marked for a
dropdown, WWP created the <div> immediately following that
paragraph, and ended the <div> according to certain rules.
Reading between the lines, I've come to the conclusion that
setting up equivalent conversion behaviour in RH is not possible,
and that if I want drop-down hotspots, I'll have to edit each HTML
topic to add the javascript and define the <div> (probably
using an "add drop-down hot spot" feature in the topic editor).
Please correct me if I'm wrong.