<input type="hidden" name="cartname_eCart_1_ID_Add" value="<%=(rs.Fields.Item("ProdID").Value)%>">
The answer is this: <%=(rs.Fields.Item("ProdID").Value & "333")%>">
However, that didn't do it. When I put this in, no error shows up but it also doesn't actually add anything.
I'm not sure what to do now. Plan A, B and C all failed...