$(function() {
    var set = $('div#top-nav div img').not('.sp-active-nav');
    set.css({opacity: 0, display: 'block'});
    set.hover(
        function() {
            $(this).fadeTo(300, 1);
        },
        function() {
            $(this).fadeTo(300, 0);
        }
    );

	
});