Javascript to automate "Click to activate"?

I am building an application in which 3D PDF documents are embedded within a web page.

I notice that some 3D PDFs require the user to "Click to activate".

Javascript running in my browser cannot talk through to the embedded PDF (via postMessage) until the user does this.

Is there any way this can be automated by some Javascript either in the PDF or in the browser?

Or is this a property of the PDF file itself?

Thanks, Tim