JavaScript的自定义对象

javasrcipt中的对象 Object

javascript中{}可以代表对象

1 javascript已经存在的类型的对象

var v = new Date();

var obj1 = new Object(), obj2 = {};//Object 对象

var arr1 = new Array(), arr2 = [];//Array 对象

var boo1 = new Boolean(true), boo2 = true;//Boolean 对象

var num1 = new Number(123), num2 = 123.45;//Number 对象

var str1 = new String("abc"), str2 = 'abc';//String 对象

2 自定义的对象1:

JSON

var person={firstname:"John", lastname:"Doe", id:5566};

alert(person.firstname);

alert(person.lastname);

alert(person.id);

3 自定义的对象2:

var p =

{

grade:1,

name : "tom",

age:27,

sex:"男",

speak:function(words)

{

alert(this.name+"说："+words+"!");

}

}

p.speak("hello");

4 自定义的对象3:

function Person(name){

this.name = name;

this.age = 20;

this.say=say;

}

function say(){

document.write(this.name+":大家好,我今年"+this.age+"岁了");

}

var p = new Person("张三");

p.say();

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function Person(name){

this.id = 1;

this.name = name;

this.age = 20;

this.say=function(msg){

document.write(this.name+" 说:"+msg);

};

}

var p = new Person("张三");

p.say();