var ads = [];
var currentIndex = 0;
var transitionTime = 5000;
var timeout = null;
var firstLoad = true;
var adRotator = {
    start: function (target) {
        $(target).each(function () { ads.push($(this)); });
        this.transition();
    },
    transition: function () {
        ads[currentIndex].fadeOut(function () {
            if (currentIndex < ads.length - 1 && !firstLoad)
                currentIndex++;
            else
                currentIndex = 0;
            ads[currentIndex].fadeIn();
            if (timeout != null)
                clearTimeout(timeout);
            timeout = setTimeout(adRotator.transition, transitionTime);
            firstLoad = false;
        });
    }
}

$(document).ready(function () {
    adRotator.start("#adRotator div");
});