function toggleFolder(folderId) {
	if (document.getElementById(folderId).className == "hidden") {
		document.getElementById(folderId).className = "shown";
	} else {
		document.getElementById(folderId).className = "hidden";
	}
	return true;
}

function expandAllFolders(numFolders) {
	for (i = 1; i <= numFolders; i++) {
		document.getElementById(i).className = "shown";
	}
}

function collapseAllFolders(numFolders) {
	for (i = 1; i <= numFolders; i++) {
		document.getElementById(i).className = "hidden";
	}
}