浅谈几种常用的JS类定义方法

var obj1 = { v1 : "", get_v1 : function() {  return this.v1; }, set_v1 : function(v) {  this.v1 = v; }};

var Obj = function() { var v1 = ""; this.get_v1 = function() {  return this.v1; }; this.set_v1 = function(v) {  this.v1 = v; }};

var Obj3 = new Function();Obj3.prototype = { v1 : "", get_v1 : function() {  return this.v1; }, set_v1 : function(v) {  this.v1 = v; }};

function loadObj() { var tmp = new Object(); tmp.v1 = ""; tmp.get_v1 = function() {  return tmp.v1; }; tmp.set_v1 = function(v) {  tmp.v1 = v; }; return tmp;}obj1.set_v1('hello1');alert(obj1.get_v1());var obj2 = new Obj();obj2.set_v1('hello2');alert(obj2.get_v1());var obj3 = new Obj();obj3.set_v1('hello3');alert(obj3.get_v1());var obj4 = loadObj();obj4.set_v1('hello4');alert(obj4.get_v1());alert(obj1);alert(obj2);alert(obj3);alert(obj4);