JS继承

<script type="text/javascript">

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 SuperType(name){
    this.name = name;
    this.color = ["red","blue","greed"];
}

SuperType.prototype.sayName=function(){
    alert(this.name);
}

function SubType(name,age){
    SuperType.call(this,name);
    this.age=age;
}

inheritPrototype(SubType,SuperType);

SubType.prototype.sayAge=function(){
    alert(this.age);
};
    
    //var parent = new SuperType("Hello");
    var sub = new SubType('Hello', 18);
    alert(sub.name);
    alert(sub.age);
    alert(sub.color);
    sub.sayName();
    sub.sayAge();
</script>