// ==UserScript==
// @name        Youtube-to-mp3 Link
// @namespace   n00bfest.com
// @include     http://www.youtube.com/*
// @version     1
// ==/UserScript==

var $;

// Add jQuery
(function(){
    if (typeof unsafeWindow.jQuery == 'undefined') {
        var GM_Head = document.getElementsByTagName('head')[0] || document.documentElement,
            GM_JQ = document.createElement('script');

        GM_JQ.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js';
        GM_JQ.type = 'text/javascript';
        GM_JQ.async = true;

        GM_Head.insertBefore(GM_JQ, GM_Head.firstChild);
    }
    GM_wait();
})();

// Check if jQuery's loaded
function GM_wait() {
    if (typeof unsafeWindow.jQuery == 'undefined') {
        window.setTimeout(GM_wait, 100);
    } else {
        $ = unsafeWindow.jQuery.noConflict(true);
        letsJQuery();
    }
}

// http://stackoverflow.com/questions/901115/get-query-string-values-in-javascript
function getParameterByName(name)
{
    name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
    var regexS = "[\\?&]" + name + "=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(window.location.search);
    if(results == null)
        return "";
    else
        return decodeURIComponent(results[1].replace(/\+/g, " "));
}


// All your GM code must be inside this function
function letsJQuery() {
    //icon = '<img src="http://a.dryicons.com/images/icon_sets/coquette_part_6_icons_set/png/32x32/mp3_file.png">';
    var icon = '<img src="http://cdn.last.fm/favicons/itunes16x16.png">';
   
    // Extract v param
    var key = getParameterByName('v');
   
    // Build Download Link
    var link = 'http://www.youtube-mp3.org/#v=' + key;
   
    title = $('h1#watch-headline-title');
    title.append('<a href="'+ link +'">' + icon + '</a>');
}