function showInner(showlayer){
	var innerdivs = new Array("teaser_red","teaser_blue","teaser_green","teaser_purple");
	for (i=0;i<innerdivs.length;i++){
		if (showlayer!=i){
			document.getElementById(innerdivs[i]).style.display = 'none';
		}
		else {
			document.getElementById(innerdivs[i]).style.display = 'block';
		}
	}
}