<script>    var v1 = new Object();    v1.name = "name1";    v1.age = 19;    v1.sex = 1;    alert(v1.name);    function obj(name, age, sex) {        this.name = name;        this.age = age;        this.sex = sex;    }    var v2 = new obj("name2", 18, 1);    alert(v2.name);    v3 = { name: "name3", age: 20, sex: 1 };    alert(v3.name);</script>