function registerNS(ns) {
	var nsParts = ns.split(".");
	var root = window;

	for (var i = 0; i < nsParts.length; i++) {
		if (typeof root[nsParts[i]] == "undefined")
			root[nsParts[i]] = new Object();

		root = root[nsParts[i]];
	}
}

registerNS('lhc');
lhc.keyCodes = { Down: 40, Up: 38, Enter: 13, Left: 37, Right: 39, Tab: 9 };