public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest req, HttpServletResponse resl)
	{
		HttpSession session = req.getSession();
		LogonForm user = (LogonForm) session.getAttribute("user");
		
		if(user != null )
		{
			session.removeAttribute("user");
			session.invalidate();
			return mapping.findForward("success");
		}
		else
		{
			return mapping.findForward("failure");
		}
	}