press a button on external site with javascript

Question

is there a way to press a button on external site with javascript and/or jquery? Like I open a new window like this:

windowObjectReference = window.open("http://some_site.html","name"); 

Then I want to press a button on this site. Something like this:

windowObjectReference.button.click();

Or:

name.button.click();

Answer 1

It would be a huge security violation if a browser would let you do that from the script placed on your own website.

So, no, this cannot be done, and should not be possible.

But...

If both sites belong to you (you have access to their code), you can pass a parameter (eg. as a hash within URL), then the target website may read it and fire the event you mentioned (name.button.click()).