excutescript doenst work

// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

document.addEventListener('DOMContentLoaded', function() {
    document.getElementById("start_button").addEventListener("click", function() {
        chrome.tabs.query({active:true, currentWindow: true}, function(tabs){

            chrome.tabs.sendMessage(tabs[0].id, {
                type: "start",
                text: "num of divs"
            });

        });
    })
});



chrome.runtime.onMessage.addListener(function(message, sender, sendResponse) {
    console.log(sender.tab.url);

    if (message.greeting == "info") {
        alert('recideved ' + message.greeting + ' in background');

        var i, recieved_data = message.data;
        alert('RECIEVED:' + recieved_data);

        chrome.tabs.create({
            active: false, url: 'http://www.editpad.org/'
        }, function(tab) {
            chrome.tabs.executeScript(tab.id, {
                //var serialized_data = JSON.stringify(recieved_data);
                code: 'document.getElementById("text").value = ' + recieved_data,
            }, function(result) {
                if (!result) {
                    alert('Failed to run content script.\n' + chrome.runtime.lastError.message);
                    console.log('failed to execute script');
                    return;
                }
                alert('you typed: "' + result[0] + '"');
            });
        });

        //sendResponse({farewell: "welldone"});
    }
});



function get_specific_stuff(name) {
    var i, tmp, text_to_send, results;

    results = document.getElementsByClassName(name);
    alert('num' + results.length);

    text_to_send = "";
    for (i = 0; i < results.length; i++) {
        text_to_send += results[i].innerText;
    }
    alert('SENT: ' + text_to_send);

    chrome.runtime.sendMessage({greeting: "info", data: text_to_send}, function(response){});
}

function access_page_stuff(text) {
    var name = "bibtex";
    get_specific_stuff(name);
}

chrome.extension.onMessage.addListener(function(message, sender, sendResponse) {
    switch (message.type) {
        case "start":
            access_page_stuff(message.text);
        break;
    }
});

/*
chrome.runtime.onMessage.addListener( function(message, sender, sendResponse) {
    switch (message.type) {
        case "start":
            alert('recieved message 2');
            get_stuff_from_page(message.text);
    }
});*/