How to "focus" on Facebook Comments Plugins' textarea?

Question

I have a button in the html:

<a id="comment">Comment</a>

When it is clicked I want the browser to focus on Facebook comments' textarea. I have:

$("#comment").click(function() {
        $("#fb-comments textarea").focus();
    });

but it doesn't work

Answer 1

It's served via an Iframe from Facebook, so you cannot access the content due to the Same Origin Policy. (you cannot do this at all)