Google navbar Grooveshark entry

// ==UserScript==
// @name           GoogleGroovesharkBar
// @description    Adds a 'Search on Grooveshark' option to Google's black navigation bar
// @include        google.com/*
// @include        google.nl/*
// @include        https://www.google.com/*
// @include        https://www.google.nl/*
// @include        http://www.google.com/*
// @include        http://www.google.nl/*
// @require        http://code.jquery.com/jquery-1.10.1.min.js

//by Soullesswaffle
//Versions : 0.8
// ==/UserScript==

function addGroove(retrievedText) {
    var bar = document.getElementById("gbzc");
    var grooveyImage = document.createElement("img");
    var link = document.createElement("a");
    var listy = document.createElement("li");
    grooveyImage.src = "http://cdn.androidpolice.com/wp-content/uploads/2012/08/nexusae0_146.png";
    grooveyImage.style.height = "28px";

    //grooveyImage.alt doesn't display in chrome for me, but when inspecting the element the alt attribute is present and correct.
    if (retrievedText === "") {
        link.href = "http://grooveshark.com";
        grooveyImage.alt = "Grooveshark";
    } else {
        link.href = "http://grooveshark.com/#!/search?q=" + retrievedText;
        grooveyImage.alt = "Search for '" + retrievedText + "' on Grooveshark";
    }

    //Nest and display everything
    link.appendChild(grooveyImage);
    listy.appendChild(link);
    listy.id = "grvshrkbtn";
    if (!document.getElementById("grvshrkbtn")) {
        bar.appendChild(listy);
    } else {
        bar.replaceChild(listy, document.getElementById("grvshrkbtn"));
    }
}

//Initialize
$(document).ready(function () {
    addGroove(document.getElementById("gbqfq").value);
});

//Watch textfield for changes
$("#gbqfq").bind("input", function () {
    addGroove($(this).val());
});