Disable Focus on Window Load

// ==UserScript==
// @name           Disable Focus on Window Load
// @namespace      http://userscripts.org/
// @description    Stop stealing focus and hotkeys
// @include        *://www.change.org/*
// @include        *://answers.yahoo.com/*
// @include        *://alternativeto.net/*
// @include        *://www.facebook.com/*
// @include        *://*.deviantart.com/*
// @include        *://*.yahoo.com/*
// @include        *://www.google.*
// @include        *://*thefreedictionary.com/*
// @include        *://github.com/*
// @include        *://imgur.com/*
// @include        *://www.merriam-webster.com/*
// @run-at         document-end

// ==/UserScript==

function disableFocus(evt) {
    if (evt.target.nodeName == "#document") {
        var input_elements = document.getElementsByTagName('input');
        for (var i = 0; i < input_elements.length; i++) {
            input_elements[i].blur();
        }
    }
}

if(document.URL.indexOf("www.google") >= 0)
{   document.addEventListener('keydown', function(e) {
        if (document.activeElement.nodeName != 'INPUT' && !e.ctrlKey && !e.altkey) {
            e.cancelBubble = true;
            e.stopImmediatePropagation();
            return false;
            }
        return true;
        }, true);
}
else if(document.URL.indexOf("imgur") >= 0)
{   document.addEventListener('keydown', function(e) {
        if (e.keyCode == 37 || e.keyCode == 39) { //disable left and right arrow keys
            e.cancelBubble = true;
            e.stopImmediatePropagation();
            return false;
            }
        return true;
        }, true);
    document.addEventListener('scroll', function(e) {
            e.cancelBubble = true;
            e.stopImmediatePropagation();
            return false;
            }, true);
}
else
    window.addEventListener('load', disableFocus, true);