Follow these links it may help you
<a href="http://csharpdotnetfreak.blogspot.com/2009/09/popup-update-refresh-parent-child.html">http://csharpdotnetfreak.blogspot.com/2009/09/popup-update-refresh-parent-child.html</a>[<a href="http://csharpdotnetfreak.blogspot.com/2009/09/popup-update-refresh-parent-child.html" target="_blank" title="New Window">^</a>]
<a href="http://wiki.asp.net/page.aspx/282/">http://wiki.asp.net/page.aspx/282/</a>[<a href="http://wiki.asp.net/page.aspx/282/" target="_blank" title="New Window">^</a>]