function OnClientValueChanged(sender, args)
{
logEvent(GetServerId(sender.get_id()) + ".OnClientValueChanged: Value is changed to " + args.get_newValue());
}
check client side demo :http://demos.telerik.com/aspnet-ajax/input/examples/programming/clientside/apievents/defaultcs.aspx and : http://www.telerik.com/help/aspnet-ajax/introduction.html