Client-page lifecycle

Sys.Application object lifecycle:
init, load, unload
1) When browser starts: Sys.Application object start initializing the MS Ajax library's runtime. firle the init event, initialized and instantiated all the client components.

2)Sys.Applicaton fires the load event.

3) when user mavigates away from the page or reloads page, the unload event of the window object intercepted by Sys.Application