jQuery(document).ready(function() {

    $('#menu-header-navigation .menu-item > h4 > a').mouseenter(function() {
        $(this).stop().css({background:"none", position:"relative", zIndex: 1}).fadeTo('fast', 0);
        index = $("#menu-header-navigation .menu-item > h4 > a").index(this); 
        mb = $("#menu-background-wrapper .menu-background:eq(" + index + ")");
        mb.stop().css({marginTop: "115px", display: "block"}).animate({marginTop: "0px"});
    });
    
    $('#menu-header-navigation .menu-item > h4 > a').mouseleave(function() {
        $(this).stop().fadeTo('slow', 1);
        index = $("#menu-header-navigation .menu-item > h4 > a").index(this);
        mb = $("#menu-background-wrapper .menu-background:eq(" + index + ")");
        mb.stop().animate({marginTop: "115px"});
    });
    
});