nikkei-pc-em-refs.user.js

// ==UserScript==
// @name           nikkei-pc-em-refs
// @namespace      http://slashdot.jp/~umq/
// @description    Notify old articles
// @include        http://pc.nikkeibp.co.jp/article/*
// ==/UserScript==

(function(){
    var node = document.evaluate(
	'//span[@class="co_capS"]',
	document, null,
	XPathResult.FIRST_ORDERED_NODE_TYPE, null);

    if (node.singleNodeValue) {
	var mediaSourceNote = document.createElement('div');
	mediaSourceNote.setAttribute('id', 'nikkei-pc-em-refs');

	var mediaSourceTitle = document.createElement('b');
	mediaSourceTitle.appendChild(
	    document.createTextNode(
		node.singleNodeValue.textContent));
	mediaSourceNote.appendChild(mediaSourceTitle);

	var node = document.evaluate(
	    '//div[@class="co_capS"]',
	    document, null,
	    XPathResult.FIRST_ORDERED_NODE_TYPE, null);

	if (node.singleNodeValue) {
	    mediaSourceNote.appendChild(document.createElement('br'));
	    mediaSourceNote.appendChild(
		node.singleNodeValue.firstChild.cloneNode(true));

	    var nStyle = mediaSourceNote.style;
	    nStyle.cursor = 'pointer';
	    nStyle.position = 'fixed';
	    nStyle.top = '1em';
	    nStyle.left = '1ex';
	    nStyle.zIndex = '10';
	    nStyle.backgroundColor = '#222';
	    nStyle.color = 'white';
	    nStyle.linkColor = 'white';
	    nStyle.vlinkColor = 'white';
	    nStyle.fontSize = 'large';
	    nStyle.border = '3px solid red';
	    nStyle.padding = '1ex';
	    document.body.appendChild(mediaSourceNote);

	    document.getElementById('nikkei-pc-em-refs').addEventListener(
		'click',
		function() {
		    document.body.removeChild(this);
		},
		false);
	}
    }
})();