jQuery(function($) {
    $('#portal-globalnav li').ahover({moveSpeed: 100, hoverEffect: function() {
        $(this)
            .css({opacity: 0.99})
            .animate({opacity: 0.5}, 750)
            .animate({opacity: 0.99}, 750)
            .dequeue();
        $(this).queue(arguments.callee);
    }});

});