复制代码 代码如下:

//采用对象冒充的方式实现js继承

function A(color) {

this.Acolor = color;

this.AshowColor = function() {

document.writeln("Acolor: " + this.Acolor);

}

}

function B(color, name) {

//将newMethod赋值A，调用A的构造函数

this.newMethod = A;

this.newMethod(color);

//然后删除对A的引用,这样以后不能调用他

delete this.newMethod;

this.Bname = name;

this.BshowName = function() {

document.writeln("Bname: " + this.Bname);

}

}

var objA = new A("red");

objA.AshowColor();

document.writeln("----------------");

var objB = new B("black", "demo");

objB.AshowColor();

objB.BshowName();

document.writeln("----------------");