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();