Message hide

As we make entry for page. on top there is message show " Customer has been added" or "Customer has been update"

which remain as is  it  till we refresh the page of switch from one tab to another tab.

hence i wrote jquery which is working but , hence message is slowing hide , but after that some of FA features doesnt work well like get_post , alert , popup for confirmation etc etc..

below is jquery which i had puted in header.php :

  echo"<script>
              jQuery(function($){
                     $('.msgbox').delay(8000).fadeOut(('slow'), function(){
                       $('.msgbox').remove();
                  });  
             });

        </script>";

hence it would be nice if it would be taken in next process too. so that message get hide after some interval of time