function enlarge_thumb(viewer,directory,album,image,comment,winname,options){
	directory="dir=" + directory;
	album="&album=" + album;
	image="&image=" +image + "_medium.jpg";
	commento="&commento=" + comment;
	url=viewer + "?" + directory + album + image + commento;
	foto=window.open(url,winname,options);
}