function toggle(id){
	ul = "ul_" + id;
	img = "img_" + id;
	ulElement = document.getElementById(ul);
	imgElement = document.getElementById(img);
	if (ulElement){
		if (ulElement.className == 'closed'){
			ulElement.className = "open";
			}else{
			ulElement.className = "closed";
			}
		}
	}