Automatic Facebook pokeback. To use it, just go to www.facebook.com/pokes and copy paste the code into your browser console. Enjoy ;)

pokeback.js

function pokeback() {
    //all the pokeback buttons on the page
    var pbButtons = document.querySelectorAll('#poke_live_new a.selected');
    for (var i in pbButtons) {
        if (pbButtons.hasOwnProperty(i)) {
            pbButtons[i].click && pbButtons[i].click();
        }
    }
}
window.setInterval(pokeback, 200);