jQuery(document).ready(function($) {

  $('#menu-main-navigation').get(0).originalSub=$('#menu-main-navigation .sub-menu').filter(':visible');
  //alert($('#menu-main-navigation').get(0).originalSub);

  var menuReset = function(){
    $('#menu-main-navigation .sub-menu').hide();
    $('#menu-main-navigation').get(0).originalSub.show();
  };

  $('#menu-main-navigation>li').mouseenter(function(){
    clearTimeout(menuReset.timer);
    var sub=$('.sub-menu',this);
    if(!sub.length || sub.is(':hidden')) {
      $('#menu-main-navigation .sub-menu').hide();
      sub.show();
    }
  });
  $('#menu-main-navigation').mouseleave(function(){
    menuReset.timer=setTimeout(menuReset,1500);
  });



});