Resolved using a manipulated ‘ensureVisible’. My Listbox displays 13 rows of options so by using logic, the selectedIndex is not in the last 6 records so I can vertically center it in the ListBox, therefore using the following:
<% if selectedmember <> "" then
if counter - selectedmember > 6 then
selectedcounter = selectedmember + 6
else
selectedcounter = selectedmember + (counter - selectedmember)
end if
%>
<script type="text/javascript">
$("#memberlistbox").jqxListBox('ensureVisible', <%=selectedcounter%> );
</script>
<% end if %>
My ListBox now centers the pre-SelectedIndex unless it is the last 6 entries and then it adjusts it up from the bottom of the ListBox.
Hope this might help someone else in the future.
Jason
