kuangkro

摘要： function ClassA() {//构造函数无任何参数this.color = "red";this.sayColor = function(){ alert(this.color); }} function ClassB(name) { this.name = name; this.sayName = function(){ alert(this.name); } } ClassB.prototype = new ClassA(); var objB = new ClassB("这是sayName方法"); var objA = new Clas 阅读全文