Alerts when a captcha is encountered.
// ==UserScript==
// @name Text Captcha Alert
// @namespace No-one
// @author DCI
// @version 0.1
// @description Alerts when a captcha is encountered.
// @include https://www.mturk.com/mturk/accept*
// @include https://www.mturk.com/mturk/continue*
// @include https://www.mturk.com/mturk/preview*
// @include https://www.mturk.com/mturk/return*
// @require http://code.jquery.com/jquery-latest.min.js
// ==/UserScript==
if ($('input[name="userCaptchaResponse"]').length > 0) {
alert("Captcha");}