google_opera_gkbr.js

// ==UserScript==
// @name Google Suggest Oopera gkbr
// @include http://www.google.co.jp/*
// ==/UserScript==
(function() {
    function main() {
        var qn = document.getElementsByName('q');
        for (var i = 0; i < qn.length; i++) {
            qn[i].addEventListener('keypress', function(e) { if (e.keyCode == 38 || e.keyCode == 40) e.preventDefault(); }, false);
        }
    }
    document.addEventListener('DOMContentLoaded', main, false);
})();