While the results of an RDS query are arriving from the database, the dataset (the records about to be bound to the DHTML table) has already been changed. This triggers an event, which in turn can be captured to trigger a visible change on the displayed page. This event on the client-side ActiveX control can be used to inform you that, for example, data is arriving.
ActiveX controls support the event model. To enable this, however, these two interfaces must be supported:
If a control supports these, you know it is capable of generating an event. If your ASP page subscribes to those events, you can write script to handle them. For example, the RDS_ondataset_changed event for the <DIV> means that data has arrived and that it can now be used.