Viewstate how u make that so that viewstate in page can not be tampered?

How to call javascript from c# code under button_click without using Button1.Attributes.Is there any method?

Page.RegisterClientScriptBlock("", "");

10 Tips for Writing High-Performance Web Applications

http://msdn.microsoft.com/en-us/magazine/cc163854.aspx

Jquery

http://www.tutorialspoint.com/jquery/index.htm