Maintain Tab Position in AJAX tab control

there can be some time when AJAX tab control will open the default tab after postback in some other tab here is a sinple solution for it.

Write a javascript function
function OnChanged(sender, args) {
sender.get_clientStateField().value = sender.saveClientState();
}

Call this in TabContainer like.
<Ajax:TabContainer runat="server" EnableViewState="true" OnClientActiveTabChanged="OnChanged">

and you are done.

Happy Coding.