FB like webhook

window.fbAsyncInit = function () {
    FB.init({
        appId: 'APPID',
        Status: true,
        Cookie: true,
        Xfbml: true
    });
    FB.Event.subscribe('edge.create', function (response) {
        Alert("Hello World! URL Liked!");
    });
};
(Function() {
    Var e = document.createElement('sc​ript');
    e.async = true;
    e.src = document.location.protocol​ + '//connect.facebook.net/en​_US/all.js';
    document.getElementById('f​b-root').appendChild(e);
}());