Complex button: gotoURL?

Hi everybody!

I used a little script from this website to make a button with rollover/roll-out effects (http://www.kirupa.com/developer/mx2004/button_effect.htm).
In the end of the script, it says:

this.onRelease = function(){
getURL(“http://www.kirupa.com","_blank”);

Now I want the button not to follow an external link, but to go to a specific frame number further in my movie. But I can’t get it (not with an extra normal button, not with gotoAndPlay(52) etc.).

Can anybody help me?

Thanks!
Ingrid