itpro-em-refs.user.js

// ==UserScript==
// @name           itpro-em-refs
// @description    Be Careful ITpro
// @include        http://itpro.nikkeibp.co.jp/article/*
// @namespace      http://tt25.org/
// @version        1.0.3
// ==/UserScript==

(function(){
    var node=document.evaluate('//div[@class="mediaSource" or @class="mediaSource2" or @class="txt8"]',
			       document, null,
			       XPathResult.FIRST_ORDERED_NODE_TYPE, null);

    if (node.singleNodeValue
	&& /<(b|span)>/i.test(node.singleNodeValue.innerHTML)) {

	var mediaSourceNote = document.createElement('div');
	mediaSourceNote.setAttribute('id', 'itpro-em-refs');

	var mediaSourceTitle = document.createElement('b');
	mediaSourceTitle.appendChild(
	    node.singleNodeValue.childNodes[1].childNodes[0].cloneNode(true));
	mediaSourceNote.appendChild(mediaSourceTitle);
	mediaSourceNote.appendChild(document.createElement('br'));
	mediaSourceNote.appendChild(
	    node.singleNodeValue.childNodes[3].cloneNode(true));

	var nStyle = mediaSourceNote.style;
	nStyle.cursor = 'pointer';
	nStyle.position = 'fixed';
	nStyle.top = '1em';
	nStyle.left = '1ex';
	nStyle.zIndex = '128';
	nStyle.backgroundColor = '#222';
	nStyle.color = 'white';
	nStyle.fontSize = 'large';
	nStyle.border = '3px solid red';
	nStyle.padding = '1ex';
	document.body.appendChild(mediaSourceNote);

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