Amazonページの仕様が変わっていたので。
追記:また仕様が変わっていたので。(2018/3/10)
javascript: d = document; dv = d.getElementsByClassName('dv-packshot'); for (i = 0; i < dv.length; i++) { aa = dv[i].getElementsByClassName('DigitalVideoWebNodeLists_Item__core')[0]; nm = aa.getAttribute('aria-label'); asin = aa.getAttribute('data-asin'); ln = 'https://www.amazon.co.jp/s/ref=nb_sb_noss_2?__mk_ja_JP=カタカナ&url=node%3D4217521051&field-keywords=' + encodeURIComponent(nm); var req = new XMLHttpRequest(); rm = dv[i].getElementsByClassName('DigitalVideoWebNodeLists_Item__itemActions')[0]; req.rm = rm; req.ln = ln; req.onreadystatechange = function () { if (this.readyState == 4 && this.status == 200) { rf = this.responseXML.getElementById("refinementsOnTop"); if (rf != null) { lt = this.responseXML.getElementById("atfResults").getElementsByTagName("li"); if (lt.length > 0) { a = d.createElement('a'); a.href = this.ln; a.textContent = '終了確認'; a.setAttribute('target', '_blank'); dv = d.createElement('div'); dv.appendChild(a); this.rm.parentNode.appendChild(dv); } } } }; req.open('GET', ln, true); req.responseType = "document"; req.send(null); };