nullJavascript中创建对象的五种方法实例

　　<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>