var DEFAULT_TIMEOUT = 4000;

function change_images () {
    images = $("#slider>img");
    cur_image = $("#slider>img.active");
    next = $(cur_image).next();
    if (next.length !== 0) {
        $(next).removeClass('disabled').addClass('active');
        $(cur_image).removeClass('active').addClass('disabled');
    } else {
        next = $('#slider>img')[0];
        $(next).removeClass('disabled').addClass('active');
        $(cur_image).removeClass('active').addClass('disabled');
    }
}

function change_divs () {
    divs = $("#sliderdiv>div");
    cur_div = $("#sliderdiv>div.active");
    next = $(cur_div).next();
    if (next.length !== 0) {
        $(next).removeClass('disabled').addClass('active');
        $(cur_div).removeClass('active').addClass('disabled');
    } else {
        next = $('#sliderdiv>div')[0];
        $(next).removeClass('disabled').addClass('active');
        $(cur_div).removeClass('active').addClass('disabled');
    }
}


$(document).ready(function () {
    setInterval(change_images, DEFAULT_TIMEOUT);
    setInterval(change_divs, DEFAULT_TIMEOUT);
});