var rotate = {
    image_url: new Array(),
    counter: null,

    slideSwitch: function() {
        if (rotate.counter < rotate.image_url.length) {
            rotate.counter = rotate.counter + 1;
        }
        else {
            rotate.counter = 1;
        }

        $('#banner').fadeOut('fast', function() {
            $('#banner').css('background-image', 'url(' + rotate.image_url[rotate.counter - 1] + ')');
            $('#banner').fadeIn('fast');
        });
    },

    init: function() {
        rotate.image_url[0] = 'images/banner01.jpg';
        rotate.image_url[1] = 'images/banner02.jpg';
        rotate.image_url[2] = 'images/banner03.jpg';
        rotate.image_url[3] = 'images/banner04.jpg';

        rotate.counter = 1;
        $('#banner').css('background-image', 'url(' + rotate.image_url[rotate.counter - 1] + ')');
    }
}

$(document).ready(function() {
    rotate.init();
    setInterval("rotate.slideSwitch()", 8000);
});