# Concatenate problem

**URL:** <https://forum.kirupa.com/t/concatenate-problem/308972>\
**Category:** Uncategorized\
**Created:** [May 4, 2010, 1:35pm UTC](https://forum.kirupa.com/t/concatenate-problem/308972 "2010-05-04T13:35:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![livtk](https://avatars.discourse-cdn.com/v4/letter/l/cdc98d/32.png) [@livtk](https://forum.kirupa.com/u/livtk)\
**Post date:** [May 4, 2010, 1:35pm UTC](https://forum.kirupa.com/t/concatenate-problem/308972/1 "2010-05-04T13:35:03Z")

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hi

I have two movieclips in stage named home,home\_mc . I want when mouseover on “home” it will change some property of “home\_mc”.But dont know how to write this code.I am trying like this…

import caurina.transitions.\*;

home.addEventListener(MouseEvent.ROLL\_OVER,over)  
[//home.addEventListener](https://home.addEventListener)(MouseEvent.ROLL\_OUT,out)  
function over(e:MouseEvent):void  
{  
Tweener.addTween(e.target.name+"\_mc",{alpha:.5});

}

but it is throwing— Error #1069: Property alpha not found on String and there is no default value.

Please help …how to fix this??  
Thanks in advance