super for any object with a prototype chain; usage: call_super(this, 'method')('hello', 'world')

call_super

window.call_super = function call_super(obj, name) {
    var super_class = Object.getPrototypeOf(Object.getPrototypeOf(obj));
    return (function () {
        super_class[name].apply(obj, arguments);
    })
}