Should i use server controls or javascript DOM for implemeting AJAX?

Question

If AJAX depends on javascript and DOM and if javascript is disabled at client side then wil my application run ajax?
So in that case, should I use server controls like Updatepanel? If that is case then why AJAX called Asynchronous Javascript and XML? What happens behind the scenes in case of AJAX Extensions' server controls like UpdatePanel?
Thank You

Suthish Nair · Answer

Hi Suresh Before answering your question you must know how Ajax works . What is the importance of DOM API XmlHttpRequest . AJAX(Asynchronous Javascript and XML) is used to render seamless user experience will increases the richness and responsiveness of the web page interface advantages also. But if not used in porper way then it will effect your application performance highly. AJAX requires users to have JavaScript enabled on their browser. Because of this an AJAX website should provide a non-AJAX alternative for users without JavaScript enabled. more...

Suresh Paldia · Answer

Thank You Koteswara...

Koteswararao Mallisetti · Answer

once we disable javascipt ajax will not work why because the scriptmanager is responsible to take the all ajxax requests and update panel said among the page which part cause ajax requests  for example you develop the one ajax form run this form and see the viewsource of that page in the place of scriptmanager we find the external javascipt file which is located at our server (non other than ajax files in the frame work ) for transferring the data between client and server through javascrip we use the xml (json format) and all calls came from javascript are not post back so this is called asynchronous javascript and xml