Using the New Callback Manager in ASP.NET 2.0
Subject:   Several other good resources
Date:   2004-08-13 06:32:01
From:   alovera
Here are several other good resources - each of which should work on the .Net 1.x Framework as well.

Implement Script Callback Framework in ASP.NET 1.x: Good, but possibly IE specific

Thycotic Software Ltd - .NET - Remote Scripting Client (without applet) for .NET and ASP: Cross browser compatible - based on JSRS.