var BOOKMARK_URL = '/bookmarks/';

function bookmark(object_id, act) {
    if (! act)
        act = 'add';
    var object_id = object_id;
    var url = BOOKMARK_URL + act + '/' + object_id + '/';
    $.getJSON(url, function(data) {
        if (data.error) {
            alert(data.error);
            return;
        }
        if (act == 'add') {
            a = 'del';
            desc = 'Rimuovi dai preferiti';
        } else {
            a = 'add';
            desc = 'Aggiungi ai preferiti';
        }
        el = $('a.' + act +'-favourite');
        el.removeClass(act + '-favourite');
        el.addClass(a + '-favourite');
        el.html(desc)
        el.unbind('click');
        el.click(function() {
            bookmark(object_id, a);
        });
    });
}