function collapseFolders(act, header) {
	var folders = document.getElementsByName('folder');
	var headers = document.getElementsByName('header');
	
	for (var x = 0; x < folders.length; x++) {		
		folders[x].className="hidden";
		headers[x].className="hidden";		
	}
	act.className="show";
	header.className="show";
	return true;
 }