JS apply call

apply-call.js

var Person = function(name,age){
    this.name = name;
    this.age = age;
}
var Print = function(){
    this.functionName = '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(' '));
    }
}
var Student2 = function(name,age,school,grade){
    Person.apply(this,arguments);
    Print.apply(this,arguments);
    console.log(this);
    this.school = school;
    this.grade = grade;
}
var s = new Student2('Jim',22,'Harvard',2);