window.addEvent('domready', function () {
	if (document.getElementById("banner")) {
		startBanner();
	}
});


function startBanner() {
	/* Banner settings */
	var showDuration = 6000;
	var container = $('banner');
	var images = container.getElements('a');
	var currentIndex = 0;
	var interval;
	/* opacity and fade */
	images.each(function (img, i) {
		if (i > 0) {
			img.set('opacity', 0);
		}
	});
	/* worker */
	var show = function () {
		images[currentIndex].set('tween', { duration: '1000' }).fade('out');
		images[currentIndex = currentIndex < images.length - 1 ? currentIndex + 1 : 0].set('tween', { duration: '1000' }).fade('in');
	};
	/* start once the page is finished loading */
	window.addEvent('load', function () {
		interval = show.periodical(showDuration);
	});
}