当修改对象的属性时,能否执行其它语句（有例子)?
下面的代码运行良好
Perl codefunction A(text,value){ var num=0; this.GetNum=function(){return num;}; this.AddNum=function(){++num;} this.Text=text; this.Value=value;} var obj=new A("Hi","World"); var num; obj.AddNum(); num=obj.GetNum();//此时num应为1; obj.AddNum(); num=obj.GetNum()；//此时num应为2;

怎样写JavaScript,达到下面这样的效果:
Perl code var obj=new A("Hi","World"); obj.Text="Hello";//这一句执行完后num自动加一（用 = 赋值时能执行其它语句） num=obj.GetNum();//此时num应为1;

------解决方案--------------------
可以参考
http://articles.sitepoint.com/print/javascript-objects
的代码

onpropertychange
------解决方案--------------------
用属性不好监控，改成调用方法吧
JScript code function A(text,value) { var num=0; this.GetNum=function(){return num;}; this.AddNum=function(){++num;} this.SetText = function(txt){ this.Text = txt; this.AddNum();}; this.Text=text; this.Value=value; } var obj=new A("Hi","World"); obj.SetText("Hello");//这一句执行完后num自动加一（用 = 赋值时能执行其它语句） num=obj.GetNum();//此时num应为1;