function a(name){this.name = name;this.colors = ["red", "blue", "green"];
}
a.prototype.sayName = function(){alert(this.name);}function b(name, age){//继承属性a.call(this, name);this.age = age;
}
//继承方法
b.prototype = new a();
b.prototype.constructor = b;
b.prototype.sayAge = function(){alert(this.age);
};
var instance1 = new b("Nicholas", 29);
instance1.colors.push("black");
alert(instance1.colors); //"red,blue,green,black"

instance1.sayName(); //"Nicholas";

instance1.sayAge(); //29

var instance2 = new b("Greg", 27);
alert(instance2.colors); //"red,blue,green"

instance2.sayName(); //"Greg";

instance2.sayAge(); //27

function object(o){function F(){}F.prototype = o;return new F();
}
function inheritPrototype(subType, superType){var prototype = object(superType.prototype); //创建对象prototype.constructor = subType; //增强对象subType.prototype = prototype; //指定对象
}
function a(name){this.name = name;this.colors = ["red", "blue", "green"];
}
a.prototype.sayName = function(){alert(this.name);
};
function b(name, age){a.call(this, name);this.age = age;
}
inheritPrototype(b, a);b.prototype.sayAge = function(){alert(this.age);
};// 调用
var instance1 = new b("Nicholas", 29);instance1.colors.push("black");
alert(instance1.colors); //"red,blue,green,black"instance1.sayName(); //"Nicholas";instance1.sayAge(); //29var instance2 = new b("Greg", 27);alert(instance2.colors); //"red,blue,green"instance2.sayName(); //"Greg";instance2.sayAge(); //27