Javascript中创建对象的几种方法

<script type="text/javascript">

// 方法一

var p0 = new Object();

p0.name = "xy";

p0.age = 20;

p0.sayName = function() { alert(this.name); }

p0.showAgeAfterSomeYears = function(year) { return this.age + year };

p0.sayName();

alert(p0.showAgeAfterSomeYears(10));

// 方法二

function Person(){

}

var p1 = new Person();

p1.name = "xy";

p1.age = 20;

p1.sayName = function() { alert(this.name); }

p1.showAgeAfterSomeYears = function(year) { return this.age + year };

p1.sayName();

alert(p1.showAgeAfterSomeYears(10));

// 方法三

function Person(name,age){

this.name = name;

this.age = age;

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

this.showAgeAfterSomeYears =  function(year) { return this.age + year };

}

var p2 = new Person("xy",20);

p2.sayName();

alert(p2.showAgeAfterSomeYears(10));

// 方法四

var p3 = {

name : "xy",

age : 20,

sayName : function(){ alert(this.name); },

showAgeAfterSomeYears : function(year) { return this.age + year }

};

p3.sayName();

alert(p3.showAgeAfterSomeYears(10));

// 方法五

var p4 = {};

p4.name = "xy";

p4.age = 20;

p4.sayName = function() { alert(this.name); }

p4.showAgeAfterSomeYears = function(year) { return this.age + year };

p4.sayName();

alert(p4.showAgeAfterSomeYears(10));

</script>