Hide a button on a page maybe jquery javascript html iframe embed clickevent perhaps

We're looking to have a button clicked from a social media channel by hiding it on a page, when a user visits the main website the first click they make anywhere on the page, will trigger this page to click the button.

We may need to use some kind of function to isolate the button, because it is not embedded, but perhaps we would have to embed it in an iframe, then isolate the button?

I hope this is clear enough but will answer questions, thank you