// ==UserScript==
// @name        localhost iframe script
// @namespace   http://localhost
// @include     http://localhost/
// @version     1
// @grant       none
// ==/UserScript==

alert("testno na localhost!");

'allow pasting'
/*
 * In window A's scripts, with A being on <http://www.nepremicnine.net:8080>:
 */

var popup = window.open("", "", "width=200, height=100");

// When the popup has fully loaded, if not blocked by a popup blocker:

// This does nothing, assuming the window hasn't changed its location.
popup.postMessage("The user is 'bob' and the password is 'secret'",
                  "https://secure.nepremicnine.net");

// This will successfully queue a message to be sent to the popup, assuming
// the window hasn't changed its location.
popup.postMessage("hello there!", "http://localhost");

function receiveMessage(event)
{

  console.log("GreaseMOnkey script");
  // Do we trust the sender of this message?  (might be
  // different from what we originally opened, for example).
  if (event.origin !== "http://localhost")
    return;

  // event.source is popup
  // event.data is "hi there yourself!  the secret response is: rheeeeet!"
}
window.addEventListener("message", receiveMessage, false);