WP Sticky Nav

    $(window).scroll(function() {
        if($('#wpadminbar').length) {
            var ht = 101;
        } else {
            var ht = 133;
        }
        if($(window).scrollTop() > ht) {
            var css = {
                position : 'fixed',
                top : -ht + 'px',
                right : 0,
                width : '100%',
                'z-index' : 9999
            };
            $('body > header').css(css);
        } else {
            $('body > header').css('position', 'static');
        }
    });