The Document Object Model (DOM) is a cross-platform and language-independent interface that treats an XML or HTML document as a tree structure wherein each node is an object representing a part of the document. The Microsoft .NET Framework 4 provides the following new features and improvements: Improvements in Common Language Runtime (CLR) and Base Class Library (BCL) Performance improvement including better multicore support, background garbage collection, and profiler attach on server. Seadragon Ajax is a pure JavaScript implementation of the Seadragon technology, released by Microsoft as an open-source library. It is now under active development as OpenSeadragon. ErrorTemplate which is the child tag of Script Manager is used to handle exception handling in Ajax. For example, you can start using the jQuery library simply by adding a