The old new Asynchronous JavaScript and XML programming (AJAX)
Is the browser dead?...of course not!
After presenting Smart Client technologies, some people ask that question; but new buzz on JavaScript + DHTML + XMLHTTP clearly shows that is not the case, also ASP.NET 2.0 will have explicit support of those old technologies.
Atlas Project
https://weblogs.asp.net/scottgu/archive/2005/06/28/416185.aspx
Microsoft to Add AJAX Capabilities to ASP.NET
https://www.devx.com/webdev/Article/28530