// ==UserScript==
// @name           twitposter
// @namespace      twitposter
// @description    keyboard shortcut for Twitter. 
// @include        http://twitter.com/*
// @include        https://twitter.com/*
// ==/UserScript==

var textArea = document.getElementById('status');
var handler = function(event){
    if(event.ctrlKey == true && event.keyCode == 13) {
        if(textArea.value == "") {
            return;
        }
        document.getElementById('doingForm').submit();
    }
};

textArea.addEventListener('keydown', handler, false);