// function for exchangeable flash previews
// - requires mootools!
function showTeaser(teaser_id) {
	var teasers = $ES('div.zflash');
	for (var i = 0; i < teasers.length; i++)  {
		teasers[i].setStyle('display', 'none');
	}
	var teaserlinks = $ES('.teaserlinediv a');
	for (var i = 0; i < teaserlinks.length; i++)  {
		teaserlinks[i].removeClass('selected');
	}
	
	var teaser = $('zflash_' + teaser_id);
	teaser.setStyle('display', 'block');
	var teaserlink = $('zflash_link_' + teaser_id);
	teaserlink.addClass('selected');
}