# What does ev mean in this code? (2 lines of code...)

**URL:** <https://forum.kirupa.com/t/what-does-ev-mean-in-this-code-2-lines-of-code/311074>\
**Category:** flash\
**Created:** [June 27, 2010, 12:37am UTC](https://forum.kirupa.com/t/what-does-ev-mean-in-this-code-2-lines-of-code/311074 "2010-06-27T00:37:21Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![ChrisMackle](https://avatars.discourse-cdn.com/v4/letter/c/958977/32.png) [@ChrisMackle](https://forum.kirupa.com/u/ChrisMackle)\
**Post date:** [June 27, 2010, 12:37am UTC](https://forum.kirupa.com/t/what-does-ev-mean-in-this-code-2-lines-of-code/311074/1 "2010-06-27T00:37:21Z")

</div>

```auto

stage.addEventListener(MouseEvent.MOUSE_DOWN, mousedown);

function mousedown(ev:MouseEvent)
{
    circle.x = ev.stage.x - circle.width/2;
    circle.y = ev.stage.y - circle.height/2;
}

```

I am new to AS3 and i want to learn it im only 14 but plan to hold a future within it creating games for a site called [kongregate.com](http://kongregate.com), lots of multiplayer games hopefully.

Could someone tell me what the “ev” in ev.stageX means?  
What are the other MOUSE events e.g. MOUSE\_DOWN?

Thanks  
Chris