// ==UserScript==
// @name           DisableOnKeyDown
// @namespace      http://www.pqrs.org/
// @author         Takayama Fumihiko <tekezo@pqrs.org>
// @include        *
// @description    Disable OnKeyDown overriding by website.
// ==/UserScript==
//
// version 1.1

(function(){
    var regexp = /^(input|select)$/i;

    var handler = function(event) {
        if (event.target.tagName.match(regexp)) return;
        event.stopPropagation();
    };

    window.addEventListener('keydown', handler, true);
    window.addEventListener('keypress', handler, true);
})();