function showNextSlide()
{
	var cur  = $('current_slide');
	var next = findNextSlide(cur);
	
	cur.fade();
	next.appear();
	
	cur.setAttribute('id', '');
	next.setAttribute('id', 'current_slide');
}
    
function findNextSlide(cur)
{
	var next = cur.next();
	if (!next)
		next = cur.ancestors()[0].childElements()[0];
	return next;
}