this指向相关的问题

    function Women(name) {
        this.name=name;
    }
    function Men(name) {
        this.name="yy1";
    }
    Object.defineProperty(Women,"name",{
    configurable:true,
    enumerable:false,
    set:function () {
        name='yy2';
    },
    get:function () {
        return 'yuy3';
    }
});
    Women.prototype=new Men();
    var a=new Women();
    var b=new Men();
console.log(Women.name);
console.log(b.name);
console.log(Men.name);
console.log(a.name);