# Instance name of dynamically added MCs?

**URL:** <https://forum.kirupa.com/t/instance-name-of-dynamically-added-mcs/294556>\
**Category:** flash\
**Created:** [August 16, 2009, 2:46pm UTC](https://forum.kirupa.com/t/instance-name-of-dynamically-added-mcs/294556 "2009-08-16T14:46:22Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![fjckls](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@fjckls](https://forum.kirupa.com/u/fjckls)\
**Post date:** [August 16, 2009, 2:46pm UTC](https://forum.kirupa.com/t/instance-name-of-dynamically-added-mcs/294556/1 "2009-08-16T14:46:22Z")

</div>

here is my code:

```php
var sp:Sprite = new Sprite();
sp.x = sp.y = 40;
addChild(sp);
for (var i:int = 0; i < 5; i++){
	var btn:MovieClip = new Button();
	btn.name = "btn" + i;
	btn.x = 0;
	btn.y = i* (btn.height + 3);
	btn.addEventListener(MouseEvent.MOUSE_OVER, onOver);
	btn.addEventListener(MouseEvent.MOUSE_OUT, onOut);
	btn0.addEventListener(MouseEvent.MOUSE_UP, onUp);// NOT WORKING, UNDEFINED PROPERTY btn0 
	sp.addChild(btn);
}

function onOver(e:MouseEvent):void{
	e.currentTarget.alpha = .5;
}

function onOut(e:MouseEvent):void{
	e.currentTarget.alpha = 1;
}

function onUp(e:MouseEvent):void{
	e.currentTarget.x += 4;
}

```

I want different actions for different MCs, but I can’t access my MCs. I gave them names **btn.name = “btn” + i;** , but whenever I tried using MCs instance name **“btn0”** or **“btn1”** and so on it didn’t work. So what is an instance names for my MCs?