ASP.NET AJAX 4.0 New AJAX Support For Data-Driven Web Apps Bertrand Le Roy Code download available at:MSDN Code Gallery(188 KB) This article is based on prerelease versions of ASP.NET. All information herein is subject to change. Contents A Postback-Based Master-Details Page The UpdatePanel Version The Pure AJAX Version The AJAX Version Templates Event Bubbling Managing the Back Button The Finishe