ctrl_lr.js

document.onkeyup = function(e) {
 var btn = { 37: 'Назад', 39: 'Вперёд' };
 var el = function(title) {
  return document.querySelector(['a[title="', title, '"]'].join(''));
 };
 Object.keys(btn).forEach(function(code) {
  if (e.ctrlKey && e.keyCode == code) {
   var link = el(btn[code]);
   if (link) link.click();
  }
 });
};