# Calling a Function inside a Flash Movie via JS

**URL:** <https://forum.kirupa.com/t/calling-a-function-inside-a-flash-movie-via-js/234923>\
**Category:** flash\
**Created:** [August 7, 2007, 7:20am UTC](https://forum.kirupa.com/t/calling-a-function-inside-a-flash-movie-via-js/234923 "2007-08-07T07:20:38Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![ChromeDemon](https://avatars.discourse-cdn.com/v4/letter/c/258eb7/32.png) [@ChromeDemon](https://forum.kirupa.com/u/ChromeDemon)\
**Post date:** [August 7, 2007, 7:20am UTC](https://forum.kirupa.com/t/calling-a-function-inside-a-flash-movie-via-js/234923/1 "2007-08-07T07:20:38Z")

</div>

I need to call a function inside a Flash Movie via JS (to update a textfield and sum Vars) can someone point me in the right direction???

I tried to figure out the external interface api, but i dont understand how it really works …

For example:

JS calls function “Fieldupdate” and in the Flash Movie the Fields and Vars Updates

thanx in advance

ChromeD