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");
            }
        )
        
        
    });