var cleaned = false;

jQuery(document).ready(function() {

  //Set up top-menu navigation
  jQuery('#nav-l > li').mouseenter( function() {
    cleanNav();
    jQuery(this).addClass("navHover");
  });
  jQuery('#nav-l > li').mouseleave( function() {
    cleaned = false;
    setTimeout('cleanNav()',30000);
  });

  jQuery('#nav-r > li').mouseenter( function() {
    cleanNav();
    jQuery(this).addClass("navHover");
  });
  jQuery('#nav-r > li').mouseleave( function() {
    cleaned = false;
    setTimeout('cleanNav()',30000);
  });

  //end setting up top-menu navigation

});

function cleanNav() {
    if (!cleaned) {
      jQuery('#nav-l > li').removeClass("navHover");
      jQuery('#nav-r > li').removeClass("navHover");
      cleaned = true;
    }
}