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>Replying to all -- this directly contradicts a note I made during an ASP.NET (3.5) course I just completed. Here is the note: "JavaScript downloaded to the client and executes there. If client browser has JS disabled, round trip to server and validated there. Validation still occurs." Maybe I got something garbled somehow. Will shoot an email to the prof asking for clarification.

That's if you're using validator controls - it's validated both on the client and the server. It doesn't mean that the JS code is executed on the server, just that they've got both JS and .NET code that validates it twice (once on client, once on server).