创建一个对象

 <script type="text/javaScript"> var newObject=new Object(); //创建一个对象 newObject.firstName="frank"; //增加一个firstName属性 newObject.sayName=function(){ alert(this.firstName); } //添加一个sayName方法
//调用sayName方法
// newObject.sayName();
// newObject["sayName"](); var FirstName=newObject["firstName"]; var whatFunction;
// if(whatVolume==1){
// whatFunction="sayName";
// }else if(whatVolume==2){
// whatFunction="sayLoudly"
// }
// newObject[whatFunction](); function sayLoudly(){ alert(this.firstName.toUpperCase()); } newObject.sayLoudly=sayLoudly; //另一种方式添加方法 newObject["sayLoudly"](); </script>

利用json（javaScript Object Notation）创建对象和上面同样的效果。

 function sayLoudly(){ alert(this.firstName.toUpperCase()); } var newObject={ firstName:"frank", sayName:function(){alert(this.firstName);}, sayLoudly:sayLoudly };
//也可以这样 var newObject={ firstName:"frank", sayName:function(){alert(this.firstName);}, sayLoudly:sayLoudly, lastName:{ lastName:"ziggy", sayName:function(){alert(this.lastName);} } }; newObject.lastName.sayName();

这样也ok

 function sayLoudly(){ alert(this.name.toUpperCase()); } function sayName(){ alert(this.name); } var newObject={ name:"frank", sayName:sayName, sayLoudly:sayLoudly, lastName:{ name:"ziggy", sayName:sayName } }; newObject.lastName.sayName();

JavaScript 中的类，还有构造方法。。。

 function newClass(){ alert("constructor"); this.firstName="frank"; this.sayName=function(){alert(this.firstName);} // return this; } //var nc=newClass(); var nc=new newClass(); //nc.firstName="ziggy"; is ok nc.sayName();

还可以这样来构造类

 function newClass(){ this.firstName="frank"; } newClass.prototype.sayName=function(){ alert(this.firstName); } var nc=new newClass(); nc.firstName="ziggy"; nc.sayName(); var nc2=new newClass(); nc2.sayName();

一般用prototypes来添加方法，这样不管有多少个实例，在内存中只有一个sayName方法。

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