$(document).ready(function(){
  
  $('#nav ul').addClass('sf-menu');
});

    $(document).ready(function(){ 
        $("ul.sf-menu").supersubs({ 
            minWidth:    12,   // minimum width of sub-menus in em units 
            maxWidth:    27,   // maximum width of sub-menus in em units 
            extraWidth:  1     // extra width can ensure lines don't sometimes turn over 
                               // due to slight rounding differences and font-family 
        }).superfish({ 
            delay:       1000,                            // one second delay on mouseout 
            speed:       'fast',                          // faster animation speed 
            autoArrows:  false,                           // disable generation of arrow mark-up 
            dropShadows: false                            // disable drop shadows 
        });  // call supersubs first, then superfish, so that subs are 
                         // not display:none when measuring. Call before initialising 
                         // containing tabs for same reason. 
    });