My game is embedded within an iFrame window on a parent webpage.
from my experience with iframes in general being it in a game or being it as an iframe on a website, it depends how it loads and where it loads from, but usually you won't be able to alter the inside contents of an iframe, as it won't be hosted on your server. however, if the game is hosted on your server, but you use an iframe to display it on another webpage on your website, you might be able to parse the data, from inside the game at its hosted location to localhost of browser and then on the displayed iframe page you can call the localhost data using javascript. other than that i have no clue.