Hi Al

It all depends on the size and usage of you web app.

If it is a small amount of script on each page that doesn't do a great deal, then using just script in your asp page is fine. But the problem is as soon as you start doing hefty stuff with a lot of hits your server's resources drop drastically. When it starts getting near that stage I would highly recomend writting a Activex dll to do all your heavy stuff and then reference it in your ASP.

Also if your getting a high hit count I would consider making the DLL into a MTS(Microsoft Transaction Server) Package, as It handles the threading a lot better than IIS does. This is quite easy to do, The msdn site shows you how

Hope this helps

Ian