Hi mohanraj,
This problem can be tackel in 2 ways
1 way :) use cross page post pack its easy one can find in google ;)
this link might help
http://csharpdotnetfreak.blogspot.com/2009/08/cross-page-posting-in-aspnet.html[
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you have to postback the page to other page not the window.location.href
2nd way :) if you dont want to change your code then just put the hidden values in session or pass them to query string
n ya server.transfer is also an option but not the favorite one :(
hope this will help you let me know if you find it difficult
:) enjoy life