('ibox-content');
                $('#vertical-timeline').removeClass('dark-timeline');
                $('#vertical-timeline').addClass('light-timeline');
            });

            $('#darkVersion').click(function (event) {
                event.preventDefault()
                $('#ibox-content').addClass('ibox-content');
                $('#vertical-timeline').removeClass('light-timeline');
                $('#vertical-timeline').addClass('dark-timeline');
            });

            $('#leftVersion')