Calling Function

I have done a search using “calling function” and tries 5 different things and still no luck but this is a simple problem

on the first and only frame of my movie I have this function

blank_mc.onAllSlidesLoaded = function() {
this.uuShow._visible = true;

The above code starts my slideshow. However I want my slideshow to start when I click on a button. So I guess I need to comment the above code out and call it through a click of a button