Object cloning in javascript

gistfile1.js

Object.prototype.clone = function () {
	var obj = {};
	for (key in this) {
		obj[key] = this[key];
	}
	return obj;
}

Object.prototype.deepClone = function () {
	var obj = {};
	for (key in this) {
		if (typeof(this[key]) == "object") {
			obj[key] = this[key].deepClone();
		}else{
			obj[key] = this[key];
		}
	}
	return obj;
}