if($.browser.msie && parseInt($.browser.version) < 9){ //Test if is IE < 7
  $("#nav li ul li:first").css({"border-top": "none"}); //Drop border from first element
  $("#nav li").mouseover(function(){ //Show submenus
    $(this).find("ul").css({"display" : "block"});
   }).mouseout(function(){ //Hide submenus
    $(this).find("ul").css({"display" : "none"});
   });
}