Hi, I have the same problem and found this thread and wonder if you can help.
I have my game on my subdomain, which is then loaded in an iframe on a page on the main domain. I am not sure if this a an issue.
I am trying to change the display of a section (Id:next) on the page. I am using Browser>Execute Javascript with the code
"window.parent.document.getElementById('next').style.display = 'block';"
which does not work.
How can I make this work?