Targeting a function from an embedded div

I have a main page where a function called openmov() resides. I've created a div on the main page called 'moviewrapper' that calls in a div named 'movie' using load(). Within 'movie' is a div called 'trigger'. I'm wondering how to get 'trigger' to fire off the function openmov() on my main page.

Thanks in advance -
sleepydad