JS dog object

<script>
window.onload = function() {
    var dog = new Dog("ben","male");

    alert("The dog's name is " + dog.getName() + ", and the sex is " + dog.getGender());
};

function Dog(n, g) {
    var name = n;
    var gender = g;

    this.getName = function() {
        return name;
    };
    this.getGender = function() {
        return gender;
    };
}
</script>