# Dynamic Blur Effect

**URL:** <https://forum.kirupa.com/t/dynamic-blur-effect/75974>\
**Category:** flash\
**Created:** [January 13, 2005, 5:46pm UTC](https://forum.kirupa.com/t/dynamic-blur-effect/75974 "2005-01-13T17:46:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![chunk](https://avatars.discourse-cdn.com/v4/letter/c/ee59a6/32.png) [@chunk](https://forum.kirupa.com/u/chunk)\
**Post date:** [January 13, 2005, 5:46pm UTC](https://forum.kirupa.com/t/dynamic-blur-effect/75974/1 "2005-01-13T17:46:04Z")

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Hello,

I know how to create a on mouse over blur effect - just have two images, one blured and one not, and use alpha to tween them it - but i have a site where the background does change, and i would like a dynamic bluring butten, the butten is pure black with alpha 20 is it is transparent, but when the user puts there mouse over the butten i would like it to blur.

I allready have tried inserting an image from photoshop that just has a blur applied but it seems that the blur effect will not blur the background behind, the blur effect is contained with in the image itself… any ideas ?

thanks.