window.addEvent('domready', function(){
        var i = 0;
        var data = {};
        do {
            var urls = document.getElementById('imageUrls'+i);
            if (!urls) {
                break;
            }
            var url = urls.innerHTML;
            data[url] = {'caption': ''};
            i++;
        } while(i < 5);
    new Slideshow('overlap', data);
});