__slide_timeout = null;
__active_slide__ = 1;
__old_efect__ = null;
function gotoIndexSlide(n) {
	if (__old_efect__ !== null) {
		return false;
	}
	try {
		clearTimeout(__slide_timeout);
	} catch (e) {}
	var el = $("index_slide_" + n);
	if (!el) {
		n = 1;
		el = $("index_slide_" + n);
	}
	$("index_slide_" + __active_slide__).style.display = "none";
	hideSlideBackgrounds();
	$("slideviewer_" + __active_slide__).style.display = "";
	el = $("index_slide_" + n);
	el.style.display = "";
	__active_slide__ = n;
	var nodeViewer = $("slideviewer");
	nodeViewer.src = el.getAttribute("alt");
	$("slideviewer_buttons").src = 'images/bottom/bottom' + __active_slide__ + '.png';
	nodeViewer.setOpacity(0);
	__old_efect__ = new Effect.Opacity(
		nodeViewer.id, {
			from: 0, to: 1, duration: 0.4,
			afterFinish : function() {__old_efect__ = null;hideSlideBackgrounds()}
		}
	);
	__slide_timeout = setTimeout("gotoIndexSlide(" + (n + 1) + ")", 10000);
}

function hideSlideBackgrounds() {
	for (var i = 1; i <= 4; i++) {
		$("slideviewer_" + i).style.display = "none";
	}
}