JS类型和对象的封装代码展示

(function(){...}());

JS CODE:

(function(){
var n = "ime";
function People(name){
this._name = name;

}
People.prototype.say = function(){
alert("peo-hello"+this._name+n);
}
window.People = People;
}());

(function(){
var n = "foo";
function Student(name){
this._name = name;
}
Student.prototype = new People();
var superSsay = Student.prototype.say;
Student.prototype.say = function(){
superSsay.call(this);
alert("stu-hello"+this._name+n);
}
window.Student = Student;
}());
var s = new Student("iwen");
s.say();