function reset_tabs(e) {
	var container = e.parentNode;
	for (var i = 0; i < container.childNodes.length; i++) {
		var tab = container.childNodes[i];
		if (tab.className && tab.className.indexOf('tab') != -1) {
			tab.className = 'tab';
		}
	}
}

function load_stills(e) {
	reset_tabs(e);
	e.className = 'selected tab';
	_('videos').style.display = 'none';
	_('stills').style.display = 'block';
}

function load_videos(e) {
	reset_tabs(e);
	e.className = 'selected tab';
	_('stills').style.display = 'none';
	_('videos').style.display = 'block';
}