function SuperType(name) {    this.name = name;    this.colors = ["red", "blue", "green"];}SuperType.prototype.sayName = function() {    alert(this.name);}// 方式一function SubType(age) {    this.age = age;}SubType.prototype = new SuperType();SubType.prototype.syaAge = function() {    alert(this.age);}// 方式二function SubType() {    SuperType.call(this, "Jerry");}// 方式三，推荐function SubType(name, age) {    SuperType.call(this, name);    this.age = age;}SubType.prototype = new SuperType();SubType.prototype.sayAge = function() {    alert(this.age);}// 方式三，推荐function object(o) {    function F() { };    F.prototype = o;    return new F();}function inheritPrototype(subType, superType) {    var prototype = object(superType.prototype);    prototype.constructor = subType;    subType.prototype = prototype;}function SubType(name, age) {    SuperType.call(this,name);    this.age = age;}inheritPrototype(SubType, SuperType);SubType.prototype.sayAge = function() {    alert(this.age);}