如果现有对象中也有嵌套属性，如何为该对象分配多个属性？

var obj = {};
obj.nestedObj = {};
obj.nestedObj.property1 = "value1";
obj.nestedObj.property2 = "value2";

var obj = {};
obj["nestedObj"] = {};
obj["nestedObj"]["property1"] = "value1";
obj["nestedObj"]["property2"] = "value2";