/**
* Person类
* @param {Object} name
*/
var Person = Ext.extend(Object,{
constructor : function(name) {this.name = name;},
setName : function(name) {this.name = name;},
getName : function() {return this.name;}
});

//创建一个对象
var p = new Person("Lily");
console.log(p.getName());//Lily
p.setName("Andy");
console.log(p.getName());//Andy
//测试instanceof及p.constructor是否正确指向了Person
console.log(p instanceof Person);//true
console.log(p.constructor == Person);//true