var timeout         = 0;
            var closetimer        = 0;
            var ddmenuitem      = 0;
            function nav_open()
            {    nav_canceltimer();
                nav_close();
                ddmenuitem = $(this).find('.stair').eq(0).css('visibility', 'visible');}
            function nav_close()
            {    if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}
            function nav_timer()
            {    closetimer = window.setTimeout(nav_close, timeout);}
            function nav_canceltimer()
            {    if(closetimer)
                {    window.clearTimeout(closetimer);
                    closetimer = null;}}
            $(document).ready(function(){    
                $('#navss > li').bind('mouseover', nav_open);
                $('#navss > li').bind('mouseout',  nav_timer);
                
                $(".navli").mouseover(
                    function(){
                        $(this).addClass("hover");
                     }
                )
                $(".navli").mouseout(
                    function(){
                        $(this).removeClass("hover");
                    }
                )
            });