$('.exchange-images').cycle({
   speed: 200,
   timeout: 4500,
   pauseOnPagerHover: 1,
   pager:  '.exchange-nav',
   pagerAnchorBuilder: function(idx, slide) {
        return '<li class="item-'+(idx+1)+'"><a href="#"></a></li>';
    },
   updateActivePagerLink: function(pager, activeIndex) {
        $(pager).find('li:eq('+activeIndex+')').addClass('active').siblings().removeClass('active');
    }
});