Simple html numeric captcha solver

After you click "Slow download" button the script solves the numeric captcha, waits for the countdown to finish, clicks the download button

As of 06.10.2015. See ბოლო ვერსია.

// ==UserScript==
// @name          Simple html numeric captcha solver
// @description   After you click "Slow download" button the script solves the numeric captcha, waits for the countdown to finish, clicks the download button
// @include       http://www.rziz.net/*/*.html
// @include       http://file.up09.com/*
// @include       http://clicknupload.com/*
// @include       http://hulkload.com/*
// @include       http://up4.im/*
// @include       http://www.gboxes.com/*
// @include       http://mrfile.co/*.html
// @version       1.0.5
// @author        wOxxOm
// @namespace     wOxxOm.scripts
// @license       MIT License
// @grant         none
// @run-at        document-end
// ==/UserScript==

var x = document.evaluate('//form//div/span[contains("0123456789",.)]', document,
						  null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
var btn = document.querySelector('[id*="btn"][id*="download"]');
if (x && btn) {
	var nodes = [];
	for (i = 0; i < 4; i++)
		nodes.push(x.snapshotItem(i));
	var nodes = nodes.sort(function(a,b){ return parseInt(a.style.paddingLeft) - parseInt(b.style.paddingLeft) });
	document.forms.F1.code.value = nodes.map(function(n){ return n.textContent }).join('');

	if (location.href.indexOf('clicknupload.com') >= 0)
		document.forms.F1.submit();
	else
		new MutationObserver(function(mutations) {
			if (!btn.disabled)
				document.forms.F1.submit();
		}).observe(btn, {attributes:true, attributesFilter:['disabled']});
}