# Classes and listeners
**URL:** https://forum.kirupa.com/t/classes-and-listeners/119306
**Category:** Uncategorized
**Created:** [August 13, 2004, 9:50am UTC](https://forum.kirupa.com/t/classes-and-listeners/119306 "2004-08-13T09:50:11Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@peshay](https://forum.kirupa.com/u/peshay)
#### Post date: [August 13, 2004, 9:50am UTC](https://forum.kirupa.com/t/classes-and-listeners/119306/1 "2004-08-13T09:50:11Z")
Hi there i want to do the following: make an instance on my stage a broadcaster, create a class called “Module”, in this class define the object as a listener, connect the class to an object on my stage or library.
Here’s what i have:
```auto
AsBroadcaster.initialize(Main_Md);
//class definition
Module = function(){
Main_Md.addListener(this);
function LoginMessage(){
this._visible=false;
}
};
Module.prototype = new MovieClip();
Object.registerClass("module3", Module);
```
And i have a button with the action
```auto
on (press) {
_root.Main_Md.broadcastMessage("LoginMessage");
}
```
Why doesnt this work? the object in the library has module3 as linkage, so that cant be the problem…help please
---
### Author:  [@senocular](https://forum.kirupa.com/u/senocular)
#### Post date: [August 13, 2004, 10:39am UTC](https://forum.kirupa.com/t/classes-and-listeners/119306/2 "2004-08-13T10:39:20Z")
you cant yous _function functionName(){}_ syntax to define functions if you’re within the block of another function. You’d need to use _functionName = function(){}_. Thats most of the problem, though with that you should be defining LoginMessage as a prototype function and not within the Module constructor.
```auto
Module = function(){
Main_Md.addListener(this);
};
Module.prototype = new MovieClip();
Module.prototype.LoginMessage = function (){
this._visible = false;
}
```
… also, you’re adding and removing modules a lot, you’d want to rewrite removeMovieClip for them to also remove them from Main\_Md’s listener list.
---
### Author:  [@peshay](https://forum.kirupa.com/u/peshay)
#### Post date: [August 13, 2004, 10:53am UTC](https://forum.kirupa.com/t/classes-and-listeners/119306/3 "2004-08-13T10:53:37Z")
Still nothing is working, I think the problem is that the movieclip doesnt get associated with the class.
---
### Author:  [@senocular](https://forum.kirupa.com/u/senocular)
#### Post date: [August 13, 2004, 11:01am UTC](https://forum.kirupa.com/t/classes-and-listeners/119306/4 "2004-08-13T11:01:49Z")
trace a check to find out
trace (clip instanceof Module)
---
### Author:  [@peshay](https://forum.kirupa.com/u/peshay)
#### Post date: [August 13, 2004, 1:55pm UTC](https://forum.kirupa.com/t/classes-and-listeners/119306/5 "2004-08-13T13:55:11Z")
What is the usual way to put an instance on the stage in a certain class. instancename Module3 classname Module? O
---
### Author:  [@senocular](https://forum.kirupa.com/u/senocular)
#### Post date: [August 13, 2004, 2:32pm UTC](https://forum.kirupa.com/t/classes-and-listeners/119306/6 "2004-08-13T14:32:25Z")
drag it on from the library or attach movie (in both cases you have to make sure the class is defined first)
[http://www.kirupa.com/developer/oop/](http://www.kirupa.com/developer/oop/)