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Not a good article at all. Makes a couple blanket statements that you should do things a certain way, but never supports the argument himself....just links to another [much better-written] article:

http://weblogs.asp.net/scottgu/archive/2007/04/04/json-hijacking-and-how-asp-net-ajax-1-0-mitigates-these-attacks.aspx

Also uses $(document).loadMyContent(...), which is NOT a standard jQuery method, and is most likely a custom plugin by the author...but he mentions nothing about it (nor gives sourcecode for it), so simply dropping this code into your page will not work.

Lastly he uses data: "{}", which is incorrect usage. Although that *may* work, the data param expects an object, so in fact that line should read data: {}.

Voting down for the quality of the article (and not the subject matter).

Check this article explain more about JQuery and JSON web service
http://www.dzone.com/links/dynamically_create_aspnet_user_control_using_jque.html