Spry select list code to wire it to html data table SET column?

Question

I am making a page based on Figure 15-14, Pg 878, in David Power's book, "Dw CS4 with CSS, Ajax and PHP. I have two separate html data tables hidden in the page, one for the specialties drop down select list and the other for the teachers master/detail regions. These are populated with php and working well. The spry select list and master/detail regions are working great except for one issue. The column in my html data table that is being filtered ("Specialty" in my code = 'Category' in the book's example code) is a SET column (with possible value of 1, 2, 3, 4, and/or 5). Clicking on the drop down menu brings up the records with a single value beautifully. The result for records with multiple values is a spry error "Invalid row number: 0". After four different versionings and methods of messing with this, I still haven't a clue. Please help me with how to rewire the Spry select list code so that it will read the records that have multiple items in that column. I have included the code below.
var data_set_teachers = new Spry.Data.HTMLDataSet(null, "teacher_data");
data_set_teachers.gallery = '1';
function chooseSet(dataSet, row, rowNumber)
if (row["Specialty"] == data_set_teachers.gallery) {
   return row;
return null;
data_set_teachers.filter(chooseSet);
function changeSet(set)
data_set_teachers.gallery = set;
data_set_teachers.filter(chooseSet);
data_set_teachers.setCurrentRowNumber(0);
var rows = data_set_teachers.getData();
for (var i = 0; i < rows.length; i++) {
   if (rows[i]["Specialty"] == set) {
     data_set_teachers.setCurrentRowNumber(i);
     break;
var data_set_specialties = new Spry.Data.HTMLDataSet(null, "specialty_data");

Answer 1

Well I'll be damned!
What's done in the sample app is, of course, the intuitively obvious choice and is exactly what I started out trying to do the first time round.
But as I mentioned before, when I first tried it (yes: I'm pretty sure I set the "for" attribute on the inlineMessage components), I got the non-unique component id exception for the inlineMessage component(s) after adding the second (but not the first) row to the page.
Anyway, after dragging my inlineMessages to the exact same position as those in the AppModel example, now things work fine (except I think I'd like a line break before the message and to change the row/column styles so the values and messages line up properly...the look is rather ugly in the AppModel example when there are validation messages displayed).
Not sure, but I'm thinking maybe there was an issue with where the inline message markup was placed, my first time through, relative to the data table value bound component and the column header facet?
I was using the application view drag 'n drop feature the first time round and dragged the inlineMessage component to the spot just below the data table value bound component and hence just above the column header facet. In the AppModel example, OTOH, the inline messages are placed just after the column header facet.
Of course, I will now try to duplicate the original exception.
If I can (and it is an issue with placement), I will post back some sort of bug report or RFE. Otherwise, I'll post back declaring what a bone head I've been...;-)
Anyway, thanks for the quick response, v.
Campbell