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<title>每天一个JavaScript实例-apply和call的使用方法</title>
<script>
function Person(name,age){   //定义一个类，人类  
    this.name=name;     //名字  
    this.age=age;       //年龄 
    this.sayhello=function(){console.log("hello")};
} 
function Print(){            //显示类的属性 
    this.funcName="Print"; 
    this.show=function(){      
        var msg=[];
        for(var key in this){ 
            if(typeof(this[key])!="function"){
                msg.push([key,":",this[key]].join(""));
            }
        } 
        console.log(msg.join("-----"));
    };
} 
function Student(name,age,grade,school){    //学生类 
    Person.apply(this,arguments);
    Print.apply(this,arguments);
    this.grade=grade;                //年级 
    this.school=school;                 //学校 
} 
var p1=new Person("jake",10);
p1.sayhello();
var s1=new Student("tom",13,6,"清华小学");
s1.show();
s1.sayhello();
console.log(s1.funcName);
</script>
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