http://d.hatena.ne.jp/mallowlabs/20070116/1168943609

grb+_for_opera.user.js

// ==UserScript==
// @name GR+?B for Opera
// @author mallowlabs
// @version 0.0.1
// @namespace http://mallowlabs.s206.xrea.com/
// @published 2007-01-16
// @license public domain
// @description show ?B button and count in Google Reader for Opera
// @include http://www.google.com/reader/view/*
// ==/UserScript==
 
// original author is id:nozom
// see http://d.hatena.ne.jp/nozom/20061017/1161103922
 
(function() {
  var busy = false;
 
  function createBookmarkIcon(link) {
    var img = document.createElement('img');
    img.setAttribute('src', "http://d.hatena.ne.jp/images/b_entry.gif");
    img.setAttribute('style', 'vertical-align: middle;');
 
    var img2 = document.createElement('img');
    img2.setAttribute('src', "http://b.hatena.ne.jp/entry/image/large/" + link);
    img2.setAttribute('style', 'vertical-align: bottom;margin-left: 2px;');
 
    var a = document.createElement('a');
    a.setAttribute('href', "http://b.hatena.ne.jp/entry/" + link);
    a.setAttribute('target', "_blank" + link);
    a.appendChild(img);
    a.appendChild(img2);
 
    var node = document.createElement('span');
    node.setAttribute('class', 'hatena-bookmark-icon');
    node.appendChild(a);
 
    return node;
  }
 
  function timerHandler() {
    if (busy){ return; }
    busy = true;
    
    var entryURLs = document.evaluate('//h2[@class="entry-title"]/a/@href', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    
    if (entryURLs.snapshotLength > 0) {
      
      var entryActions = document.evaluate('//div[@class="entry-actions"]', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
 
      for (var i = 0; i < entryActions.snapshotLength; i++) {
        var entryNode = entryActions.snapshotItem(i);
        
        // avoid duplication
        var hatenaNodes = document.evaluate('span[@class="hatena-bookmark-icon"]', entryNode, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
        if (hatenaNodes.snapshotLength === 0) {
          entryNode.appendChild(createBookmarkIcon(entryURLs.snapshotItem(i).textContent));
        }
      }
    }
    busy = false;
  }
 
  // be careful not to be too busy
  setInterval(timerHandler, 3000);
})();