Load content via jQuery.load

gistfile1.txt

$(function() {
    var links = $("a[data-ajax]"),
        spinner = $('<img src="assets/img/295.gif" />');
    links.each(function(i, element) {
        $(element).on('click', function() {
            var content = $('#content'),
                href = this.href,
                $this = $(this);
            spinner.css({
                position: 'absolute',
                top: (content.height() / 2) - 32 + 'px',
                left: content.position().left + (content.width() / 2) - 32 + 'px'
            });
            content.css({
                opacity: '0.5'
            });
            content.parent().append(spinner);
            content.load(href + ' #content', function() {
                content.css({
                    opacity: '1'
                });
                spinner.detach();
                $('li.active').removeClass('active');
                $this.parent().addClass('active');
                var dropdowns = $this.parents('li.dropdown');
                if (dropdowns.length > 0) {
                    dropdowns.addClass('active');
                }
                $('li.dropdown').removeClass('open');
            });
            return false;
        });
    });
});