# Why do mouse events trigger twice?

**URL:** <https://forum.kirupa.com/t/why-do-mouse-events-trigger-twice/24917>\
**Category:** flash\
**Created:** [July 7, 2003, 6:31am UTC](https://forum.kirupa.com/t/why-do-mouse-events-trigger-twice/24917 "2003-07-07T06:31:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jingman](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/jingman/32/163_2.png) [@jingman](https://forum.kirupa.com/u/jingman)\
**Post date:** [July 7, 2003, 6:31am UTC](https://forum.kirupa.com/t/why-do-mouse-events-trigger-twice/24917/1 "2003-07-07T06:31:22Z")

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I have some simple script:

[AS]Mouse.addListener(\_root);

\_root.onMouseDown = function(){  
trace(“bangarang”);  
}[/AS]

I debug, and when I press the mouse, it traces TWICE! Why is this? (Does the same thing for onMouseUp).

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**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [July 7, 2003, 6:39am UTC](https://forum.kirupa.com/t/why-do-mouse-events-trigger-twice/24917/2 "2003-07-07T06:39:13Z")

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You don’t need to add a mouse listener for this action.

[AS]\_root.onMouseDown = function() {  
trace(“bangarang”);  
};[/AS]

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<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [July 7, 2003, 6:40am UTC](https://forum.kirupa.com/t/why-do-mouse-events-trigger-twice/24917/3 "2003-07-07T06:40:44Z")

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🙂 thanks LIB

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**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [July 7, 2003, 6:41am UTC](https://forum.kirupa.com/t/why-do-mouse-events-trigger-twice/24917/4 "2003-07-07T06:41:42Z")

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No problem 🙂