Better Getters

bettergetters.js

function property(obj, prop, val) {
	for (var o = obj, i = 0, a = prop.split('.'), l = a.length; i < l; ++i) {
		if (!(a[i] in o)) return;

		if (val && i == l - 1) {
			o[a[i]] = val;
		}

		o = o[a[i]];
	}

	return val != null ? obj : o;
}