I'll continue now for those interested in the technical details. Technical Details It is easy to get the XML validation list for a field from WebPublisher. For example, here is the validation list for the Product field from the Inmagic Support Knowledgebase: view xml. The query string parameters will tell you what you need for your own database: AC=validation_lists FN=[FieldName] TN=[TextbaseName] You use AJAX to fetch the XML, then write some script to walk the DOM and create an option object for each entry, which you then add to the select object in question. I use JSMX from www.lalabird.com to do the AJAX bit. That's the easy part. The hard part is suppressing the dynamically-generated textbox, which is given an ID/name on the fly by WebPublisher, depending upon where it appears in the form. In order to suppress the thing, the script must identify it. Fortunately edit inputs are generated in numerical order, so the textbox will be named EIx, where x is an integer and corresponds to the textbox's location among the other inputs. Rather than assume "it's the 3rd one down so it must be EI3", the script is able to locate it within a specially marked container tag and render it non-visible.
The input EIx remains the "active" element, whose value WPP works with on submit. The dropdown itself will be ignored. Any selection change in the dropdown calls UpdateSelection() to update the EIx value even though EIx does not display, since the script set it to style="display:none;".