function Layer (name) {
	if (document.getElementById) {
		return document.getElementById(name);
	}
	if (document.all) {
		return document.all[name];
	}
	if (document.layers) {
		if (document.layers[name]) {
			return document.layers[name];
		}
		if (document[name]) {
			return document[name];
		}
	}
	return false;
}
function mR (mV) {
	mA = Layer('m_' + mV);
	if (mA) {
		mA.style.visibility = 'hidden';
		mA.style.display = 'none';
	}
	mB = Layer('n_' + mV);
	if (mB) {
		mB.style.visibility = 'visible';
		mB.style.display = '';
	}
	return false;
}