LiveJournal Editor Autosave Watch

LiveJournalAutosaveWatch.user.js

// ==UserScript==
// @name          LiveJournal Editor Autosave Watch
// @namespace     https://gist.github.com/sanmai
// @description   Warns user if autosave not happens
// @include       http://www.livejournal.com/update.bml*
// @author        Alexey Kopytko
// @updateURL     https://gist.github.com/sanmai/8caa70f4f3132d543bd7/raw/LiveJournalAutosaveWatch.user.js
// @version       1.0
// @licence       MIT
// ==/UserScript==

var warning = unsafeWindow.jQuery('<div style="position: fixed; top: 1em; right: 1em; border: 2px solid red; background-color: white; padding: 1em; font-size: 2em; z-index: 100;">Document Not Saved</div>');
warning.appendTo("body").hide();

var prevValue = '';
var checkEverySeconds = 60;

window.setInterval(function () {
    var elements = document.getElementsByClassName('b-updatepage-draft');
    if (!elements.length) {
        return;
    }

    var currentValue = elements[0].textContent;
    if (currentValue == prevValue && prevValue != '') {
	warning && warning.show();
    } else {
	prevValue = currentValue;
	warning && warning.hide();
    }
}, 1000 * checkEverySeconds);