var iNextImage = 1;
var aBanners = new Array('topper-1.gif', 'topper-2.gif', 'topper-3.gif');
dojo.addOnLoad(function() {

    window.setInterval(function() {
        if (iNextImage >= aBanners.length)
            iNextImage = 0;
        var curImage = aBanners[iNextImage++];
        var oAnim = dojo.fadeOut({node: "home_topper", duration: 800});
        oAnim.onEnd = function() {
            dojo.style("home_topper", "backgroundImage", "url(" + dojo.config.imagesDir + "/" + curImage + ")");
            dojo.style("home_topper", "opacity", "100");

            var iAfterNext = iNextImage;
            if (iNextImage >= aBanners.length)
                iAfterNext = 0;
            var nextImage = aBanners[iAfterNext];
            dojo.style("home_topper_back", "backgroundImage", "url(" + dojo.config.imagesDir + "/" + nextImage + ")");
        }
        oAnim.play();
    }, 7000);
});