function displayObj (anId, aBool) {
	document.getElementById(anId).style.display = (aBool ? "block" : "none");
	return true;
}

function setObj (anId, aValue) {
	document.getElementById(anId).value = aValue;
	return true;	
}

function toggleSubmenu(aNum) {
	if (selMenu >= 0)
		displayObj ( 'submenu' + selMenu, false );
	displayObj ( 'submenu' + aNum, (aNum != selMenu) );
	selMenu = (aNum != selMenu) ? aNum : -1;
}