Event.observe(window, "load", function() {
	var $dls = $$(".dlc-2");
	var idx = 0;
	var btnStyle = {
		display: 'block',
		cursor: 'pointer'
	};
	
	function showOne() {
		$dls.each(function($elem) {
			$elem.hide();
		});
		if ($dls[idx]) {
			$dls[idx].show();
		}
	}
	
	function stepForward() {
		idx = (idx < $dls.length - 1) ? idx + 1 : 0;
		showOne();
	}
	function stepBack() {
		idx = (idx > 0) ? idx - 1 : $dls.length - 1;
		showOne();
	}
	
	$$('.dlc-forward').each(function($elem) {
		$elem.observe("click", stepForward).setStyle(btnStyle);
	});
	$$('.dlc-back').each(function($elem) {
		$elem.observe("click", stepBack).setStyle(btnStyle);
	});
	
	showOne();
});