A8C - Once key field auto-filler

oncefiller.user.js

// ==UserScript==
// @name         A8C - Once key field auto-filler
// @namespace    http://automattic.com/
// @version      0.1
// @description  Pre-fill Once fields
// @author       Remi Corson
// @match        https://mc.a8c.com/once/*
// @require http://code.jquery.com/jquery-latest.js
// @grant        none
// ==/UserScript==

(function() {
	'use strict';

	var getUrlParameter = function getUrlParameter(sParam) {
		var sPageURL = decodeURIComponent(window.location.search.substring(1)),
			sURLVariables = sPageURL.split('&'),
			sParameterName,
			i;

		for (i = 0; i < sURLVariables.length; i++) {
			sParameterName = sURLVariables[i].split('=');

			if (sParameterName[0] === sParam) {
				return sParameterName[1] === undefined ? true : sParameterName[1];
			}
		}
	};

	$(document).ready(function() {
		var key = getUrlParameter('key');
		if (key.length > 0) {
			$("input[name='key']").val(key);
			$('#once-get form').submit();
		}
	});

})();