Override javascript functions

I want to override js function in this way:

var elements = {
  "Element": {
    name: Element,
    events: ["focus","blur"]
  },
  "Window": {
    name: Window,
    events: ["scroll"]
  }
}

$.each(elements, function( k, v ) {
  $.each(v.events, function( i, val ) {
    if (val) {
      console.log(v.name.prototype[val]);

      v.name.prototype[val] = function () {
        return false;
      }
    }
  });
});

Update: fixed, does anyone have suggestions how to make it better?

demo