http://stocker.jp/diary/amazon-bookmarklet/ を参考に作成

hatena isbn

javascript:
  (function(){
    if(document.URL.indexOf('amazon.co.jp') == -1){
      prompt('コピーしてください','`'+document.title+'%20'+'<'+document.URL+'>`_');
    }
    else {
      var title = document.getElementById('btAsinTitle').textContent;
      var b = document.getElementsByTagName('b');
      var r;
      for(i=0;i<b.length;i++)if(/ISBN-13/i.test(b[i].innerHTML))r=b[i].parentNode.innerHTML.match(/(\d{3})-(\d+)/);
      var isbn = r[1]+r[2];
      prompt('Amazon Hatena mode','isbn:'+isbn+':detail:small'+'%20"'+title+'"');
    }
  })();