Another YouTube Downloader

// ==UserScript==
// @name           Another YouTube Downloader
// @version        1.1.7
// @updateURL      http://userscripts.org/scripts/source/109643.meta.js?1.1.7
// @namespace      iampradip
// @description    Download now playing video in available formats.
// @license        BSD License; http://www.opensource.org/licenses/bsd-license.php
// @include        http://*.youtube.com/*
// @include        https://*.youtube.com/*
// @exclude        http://m.youtube.com/*
// @exclude        https://m.youtube.com/*
// ==/UserScript==


AnotherYouTubeDownloaderTranslation={ // You can add your own translation. Debug strings, video properties and helper application strings are not translated.
 strTranslations: {
  "en":{ // English
   0: "LQ Download button is shown.\n\nPress OK to hide.",
   1: "LQ Download button is not shown.\n\nPress OK to show.",
   2: "Add mobile compatible links to download links",
   3: "LQ",
   4: "LQ Download",
   5: "Loading",
   6: "Unable to fetch links. Try again.",
   7: "Unknown",
   8: "Download this video",
   9: "Download",
   10: "Stream",
   11: "Show/Hide LQ Download Button"
  }
 },
 getTranslation:function (id){
  var strUserLang=navigator.language.toLowerCase();
  if(strUserLang.indexOf("-")!=-1 && !AnotherYouTubeDownloaderTranslation.strTranslations[strUserLang]){
   strUserLang=strUserLang.substring(0,strUserLang.indexOf("-"));
  }
  if(!AnotherYouTubeDownloaderTranslation.strTranslations[strUserLang]){
   strUserLang="en";
  }
  return AnotherYouTubeDownloaderTranslation.strTranslations[strUserLang][id];
 }
};

Logger={
 blLog: false, 
 LOG_TYPE_CONSOLE: 0,
 LOG_TYPE_ALERT: 1,
 LOG_TYPE_GM_ALERT: 2,
 log: function (strMessage, intType){
  if(Logger.blLog==false)
   return;
  switch(intType){
   case Logger.LOG_TYPE_CONSOLE:
    if(typeof console != "undefined" && console.log)
     console.log(strMessage);
    break;
   case Logger.LOG_TYPE_ALERT:
    if(typeof unsafeWindow!="undefined" && unsafeWindow.alert){
     unsafeWindow.alert(strMessage);
     break; // if not, next case will be used
    }
   case Logger.LOG_TYPE_GM_ALERT: // Don't use for too many alerts
    alert(strMessage); 
    break;
  }
 }
};

AnotherYouTubeDownloader={
 blHelperInstalled: false, // Helper finds the file size of video without downloading.
 $: function(id){
  if(document && document.getElementById)
   return document.getElementById(id);
  else
   return null;
 },
 $$: function(tag){
  if(document && document.getElementsByTagName)
   return document.getElementsByTagName(tag);
  else
   return null;
 },
 isWatchPage: function(){
  return (location.pathname.indexOf("/watch")==0);
 },
 isUserChannelPage: function(){
  return (!AnotherYouTubeDownloader.isWatchPage() && (location.pathname.indexOf("/user")==0 || AnotherYouTubeDownloader.$("playnav-title-bar")));
 },
 isGreasemonkey: function(){
  try{
   if(typeof GM_getValue!="undefined" && GM_getValue("test","test")){
    return true;
   } else {
    return false;
   }
  }catch(e){
   return false;
  }
 },
 fetchDownloadLinks: function(){
  if(AnotherYouTubeDownloader.$("table-download-menu"))
   return;
  if (AnotherYouTubeDownloader.isUserChannelPage()){
   if(document.body.removeEventListener)
    document.body.removeEventListener("DOMNodeInserted",AnotherYouTubeDownloader.domChanged,false);
  }
  var divEmbed=AnotherYouTubeDownloader.$$("embed");
  var divVideos=AnotherYouTubeDownloader.$$("video");
  if(divEmbed.length>0)
   divEmbed=divEmbed[0];
  else
   divEmbed=null;
  var blLinksAdded=false;
  if(divEmbed && divEmbed.getAttribute("flashvars")) {
   try{
    AnotherYouTubeDownloader.putDownloadLinksFromFlashVars(divEmbed.getAttribute("flashvars"));
    if(AnotherYouTubeDownloader.$("table-download-menu"))
     blLinksAdded=true;
   }catch(e){
    Logger.log("Error while adding links from embed->flashvars: "+e, Logger.LOG_TYPE_ALERT);
   }
  }
  if (blLinksAdded==false && (window.yt || (typeof unsafeWindow != "undefined" && unsafeWindow.yt))) {
   try{
    var yt;
    if(window.yt)
     yt=window.yt;
    else
     yt=unsafeWindow.yt;
    if(yt.config_ && yt.config_.PLAYER_CONFIG && yt.config_.PLAYER_CONFIG.args && yt.config_.PLAYER_CONFIG.args.fmt_list && yt.config_.PLAYER_CONFIG.args.url_encoded_fmt_stream_map){
     AnotherYouTubeDownloader.putDownloadLinks(yt.config_.PLAYER_CONFIG.args.fmt_list, yt.config_.PLAYER_CONFIG.args.url_encoded_fmt_stream_map);
    }
    if(AnotherYouTubeDownloader.$("table-download-menu"))
     blLinksAdded=true;
   }catch(e){
    Logger.log("Error while adding links from embed->flashvars: "+e, Logger.LOG_TYPE_ALERT);
   }
  }
  if (blLinksAdded==false && divVideos.length>0){
   try{
    for(var i=0;i<divVideos.length;i++){
     if(divVideos[i].src)
      AnotherYouTubeDownloader.addLink(divVideos[i].src);
    }
    if(AnotherYouTubeDownloader.$("table-download-menu"))
     blLinksAdded=true;
   }catch(e){
    Logger.log("Error while adding links from embed->flashvars: "+e, Logger.LOG_TYPE_ALERT);
   }
  }
  if(blLinksAdded==true && AnotherYouTubeDownloader.isGreasemonkey()){
   AnotherYouTubeDownloader.putMobileCompatibleLinks();
  }
  if (AnotherYouTubeDownloader.isUserChannelPage()){
   if(document.body.addEventListener)
    document.body.addEventListener("DOMNodeInserted",AnotherYouTubeDownloader.domChanged,false);
  }
 },
 putDownloadLinksFromFlashVars: function(strFlashVars){
  strFlashVars=unescape(strFlashVars.replace(/&amp;/g,"&"));
  var fmt_list=strFlashVars.match(/fmt_list=.*/g)[0].substring(9);
  if(fmt_list.indexOf("&")!=-1)
   fmt_list=fmt_list.substr(0,fmt_list.indexOf("&"));
  var fmt_stream_map=strFlashVars.match(/url_encoded_fmt_stream_map=.*/ig)[0].substring(27);
  AnotherYouTubeDownloader.putDownloadLinks(fmt_list, fmt_stream_map);
 },
 putDownloadLinks: function(fmt_list, fmt_stream_map){
  var fmt_list_s=fmt_list.split(",");
  var fmt_stream_maps=fmt_stream_map.split(",");
  Logger.log("fmt_list:\n"+fmt_list, Logger.LOG_TYPE_CONSOLE);
  Logger.log("fmt_list_s:\n"+fmt_list_s, Logger.LOG_TYPE_CONSOLE);
  Logger.log("fmt_stream_map:\n"+fmt_stream_map, Logger.LOG_TYPE_CONSOLE);
  Logger.log("fmt_stream_maps:\n"+fmt_stream_maps, Logger.LOG_TYPE_CONSOLE);
  for(var i=0;i<fmt_list_s.length;i++){
   var vid_vars=fmt_stream_maps[i].split("&");
   var url="";
   var conn="";
   var stream="";
   var type="";
   var quality="";
   var stereo3d=0;
   var itag=-1;
   var resolution="";
   
   for(var j=0;j<vid_vars.length;j++){
    var key=vid_vars[j].substr(0,vid_vars[j].indexOf("="));
    var value=unescape(vid_vars[j].substr(vid_vars[j].indexOf("=")+1));
    switch(key){
     case "itag": if(itag==-1) itag=value;break;
     case "url": if(url=="" && conn=="") url=value;break;
     case "conn": if(conn=="") conn=value; break;
     case "stream": if(stream=="") stream=value; break;
     case "type": if(type=="") type=value;break;
     case "quality": if(quality=="") quality=value;break;
     case "stereo3d": if(stereo3d==0) stereo3d=value;break;
     case "fallback_host": break;
     default: if(i!=fmt_list_s.length-1){
      Logger.log("New parameter found. To help make script better, please report this video URL at http://userscripts.org/scripts/discuss/109643.\n\nMore details:\n\nparameter name: "+key+"\nparameter value: "+value+"\nfmt_stream_maps["+i+"]: "+fmt_stream_maps[i], Logger.LOG_TYPE_ALERT);
     };break;
    }
   }
   if(itag==fmt_list_s[i].split("/")[0]){
    resolution=fmt_list_s[i].split("/")[1];
   } else {
    Logger.log("fmt_list and fmt_stream_maps mismatch. Please report this video URL at http://userscripts.org/scripts/discuss/109643.", Logger.LOG_TYPE_ALERT);
   }
   if(url.length!=0)
    AnotherYouTubeDownloader.addDownloadLink(url, type, resolution, quality, stereo3d, itag);
   else if(conn.length!=0)
    AnotherYouTubeDownloader.addDownloadLink(conn+(stream.length!=0?"?"+stream:""), type, resolution, quality, stereo3d, itag);
   else {
    Logger.log("Unsupported protocol found. To help make script better, please report this video URL at http://userscripts.org/scripts/discuss/109643.\n\nMore details:\n\ntype: "+type+"\nresolution: "+resolution+"\nquality:"+quality+"\nfmt_stream_maps["+i+"]: "+fmt_stream_maps[i], Logger.LOG_TYPE_ALERT);
   }
  }
 },
 gmShowHideLQLinks: function(){
  var blShowLQLinks=GM_getValue("LQDownload",true);
  if(blShowLQLinks){
   if(confirm(AnotherYouTubeDownloaderTranslation.getTranslation(0)))
    blShowLQLinks=!blShowLQLinks;
  } else {
   if(confirm(AnotherYouTubeDownloaderTranslation.getTranslation(1)))
    blShowLQLinks=!blShowLQLinks;
  }
  GM_setValue("LQDownload",blShowLQLinks);
  if(!blShowLQLinks && AnotherYouTubeDownloader.$("watch-low-quality-download")){
   AnotherYouTubeDownloader.$("watch-low-quality-download").parentNode.removeChild(AnotherYouTubeDownloader.$("watch-low-quality-download"));
  }
 },
 putMobileCompatibleLinks: function(){
  var btnMLinksButton=AnotherYouTubeDownloader.$("watch-low-quality-download");
  if(GM_getValue("LQDownload",true)==false){
   if(AnotherYouTubeDownloader.$("watch-low-quality-download"))
    AnotherYouTubeDownloader.$("watch-low-quality-download").parentNode.removeChild(AnotherYouTubeDownloader.$("watch-low-quality-download"));
   return;
  }
  var divWatchActions=AnotherYouTubeDownloader.getWatchActionsEl();
  if(divWatchActions && !btnMLinksButton){
   btnMLinksButton=document.createElement("button");
   btnMLinksButton.id="watch-low-quality-download";
   btnMLinksButton.className="yt-uix-button b";
   btnMLinksButton.title=AnotherYouTubeDownloaderTranslation.getTranslation(2);
   btnMLinksButton.addEventListener("click", AnotherYouTubeDownloader.fetchLowQualityLinks, false);
   divWatchActions.appendChild(btnMLinksButton);
  }
  if(btnMLinksButton){
   btnMLinksButton.innerHTML="<span class=\"yt-uix-button-content\">"+(AnotherYouTubeDownloader.isCosmicPanda()?AnotherYouTubeDownloaderTranslation.getTranslation(3):AnotherYouTubeDownloaderTranslation.getTranslation(4))+"</span>";
   if(AnotherYouTubeDownloader.isCosmicPanda() && AnotherYouTubeDownloader.$("watch-like") && AnotherYouTubeDownloader.$("watch-like").getElementsByClassName("yt-uix-button-content").length>0){
    AnotherYouTubeDownloader.$("watch-like").getElementsByClassName("yt-uix-button-content")[0].innerHTML="";
   }
  }
 },
 fetchLowQualityLinks: function(){
  AnotherYouTubeDownloader.$("watch-low-quality-download").disabled=true;
  AnotherYouTubeDownloader.$("watch-low-quality-download").innerHTML="<span class=\"yt-uix-button-content\">"+(AnotherYouTubeDownloader.isCosmicPanda()?"...":AnotherYouTubeDownloaderTranslation.getTranslation(5))+"</span>";
  GM_xmlhttpRequest({
   method : "GET",
   url: "http://m.youtube.com/watch?ajax=1&layout=mobile&tsp=1&v="+AnotherYouTubeDownloader.getVidId(),
   headers: {
    "User-Agent":"iPhone"
   },
   onload: function (res){
    try{
     AnotherYouTubeDownloader.$("watch-low-quality-download").parentNode.removeChild(AnotherYouTubeDownloader.$("watch-low-quality-download"));
     var strResponse=res.responseText;
     var strLinksPart=strResponse.substr(0,strResponse.indexOf("related_videos"));
     var strLinksString=strLinksPart.split("stream_url\": ");
     for(var i=1;i<strLinksString.length;i++){
      var strLQLinkURL=strLinksString[i].substr(0,strLinksString[i].indexOf("\"",1)+1);
      if(strLQLinkURL.length>2)
       AnotherYouTubeDownloader.addLink(eval(strLQLinkURL));
     }
    }catch(e){
    }finally{
     AnotherYouTubeDownloader.toggleDownloadMenu(true);
    }
   },
   onerror: function (res){
    AnotherYouTubeDownloader.$("watch-low-quality-download").disabled=false;
    AnotherYouTubeDownloader.putMobileCompatibleLinks();
    alert(AnotherYouTubeDownloaderTranslation.getTranslation(6));
   }
  });
  return false;
 },
 addLink: function(strLink){
  var itag=parseInt(strLink.substr(strLink.indexOf("itag=")+5));
  var itags={
   13 : { type: "video/3gpp", resolution:"176x144", quality:"small" },
   17 : { type: "video/3gpp", resolution:"176x144", quality:"medium" },
   18 : { type: "video/mp4", resolution:"320x240", quality:"small" },
   36 : { type: "video/3gpp", resolution:"320x240", quality:"high" }
  };
  if(itags[itag])
   AnotherYouTubeDownloader.addDownloadLink(strLink, itags[itag].type, itags[itag].resolution, itags[itag].quality, 0, itag);
  else
   AnotherYouTubeDownloader.addDownloadLink(strLink, AnotherYouTubeDownloaderTranslation.getTranslation(7)+" ("+itag+")", AnotherYouTubeDownloaderTranslation.getTranslation(7)+" ("+itag+")", AnotherYouTubeDownloaderTranslation.getTranslation(7)+" ("+itag+")", 0, itag);
 },
 getVidId: function(){
  var strVidId;
  if(AnotherYouTubeDownloader.isWatchPage()){
   strVidId=location.search.substring(location.search.indexOf("v=")+2);
  } else if (AnotherYouTubeDownloader.isUserChannelPage()){
   var divPlayNavCurrentTitle=AnotherYouTubeDownloader.$("playnav-curvideo-title");
   if(!divPlayNavCurrentTitle)
    return "";
   var aVidLink=divPlayNavCurrentTitle.getElementsByTagName("a");
   if(aVidLink.length==0)
    return "";
   strVidId=aVidLink[0].search.substring(aVidLink[0].search.indexOf("v=")+2);
  }
  if(strVidId.indexOf("&")!=-1)
   strVidId=strVidId.substring(0,strVidId.indexOf("&"));
  if(strVidId.indexOf("#")!=-1)
   strVidId=strVidId.substring(0,strVidId.indexOf("#"));
  return strVidId;
 },
 getWatchActionsEl: function(){
  if(AnotherYouTubeDownloader.isWatchPage()){
   var divWatchActions=AnotherYouTubeDownloader.$("watch-actions");
   if(!divWatchActions){
    divWatchActions=AnotherYouTubeDownloader.$("watch-content");
   }
   if(!divWatchActions){
    divWatchActions=AnotherYouTubeDownloader.$("vo");
   }
   if(divWatchActions)
    return divWatchActions;
  } else if (AnotherYouTubeDownloader.isUserChannelPage()){
   var divPlayNavInfoLine=AnotherYouTubeDownloader.$("playnav-curvideo-info-line");
   if(divPlayNavInfoLine)
    return divPlayNavInfoLine;
  }
  return null;
 },
 isCosmicPanda: function(){
  return AnotherYouTubeDownloader.$("watch-content")!=null;
 },
 toggleDownloadMenu: function(blForce){
  var divDLContainer=AnotherYouTubeDownloader.$("watch-download-area-container");
  if(blForce==true || divDLContainer.className=="hid"){
   divDLContainer.className="";
  } else if(blForce==false || divDLContainer.className==""){
   divDLContainer.className="hid";
  }
 },
 getDownloadMenu: function(){
  var tblDownloadMenu=AnotherYouTubeDownloader.$("table-download-menu");
  if(!tblDownloadMenu){
   var divWatchActions=AnotherYouTubeDownloader.getWatchActionsEl();
   if(divWatchActions && divWatchActions.nextSibling){
    var divDownloadContainer=document.createElement("div");
    divDownloadContainer.id="watch-download-area-container";
    divDownloadContainer.className=(navigator.userAgent.indexOf("Opera Mini")==-1)?"hid":"";
    divDownloadContainer.innerHTML=""+
     "<div class=\"yt-rounded\" id=\"watch-download-area\">"+
      "<div class=\"watch-actions-panel\" id=\"watch-download-display\">"+
       "<table id=\"table-download-menu\" cellspacing=0 cellpadding=0>"+
        "<tr>"+
         "<td width=40></td>"+
        "</tr>"+
       "</table>"+
      "</div>"+
      "<div class=\"close\">"+
       "<img class=\"close-button\" id=\"watch-download-close\" src=\"http://s.ytimg.com/yt/img/pixel-vfl3z5WfW.gif\">"+
      "</div>"+
     "</div>"+
    "";
    if(divWatchActions.nextSibling)
     divWatchActions.parentNode.insertBefore(divDownloadContainer, divWatchActions.nextSibling);
    else
     divWatchActions.parentNode.appendChild(divDownloadContainer);
     
    AnotherYouTubeDownloader.addCSS(""+
     "#watch-download-area-container{margin-bottom:10px;height:auto}"+
     "#watch-download-area{border:1px solid #CCCCCC;padding:5px;position:relative}"+
     "#watch-download-area .close{cursor:pointer;position:absolute;right:5px;top:5px}"+
     "#table-download-menu{width:100%;}"+
     "#table-download-menu td{border:1px solid #E0E0E0;padding:3px 9px}"+
     "#table-download-menu td.bold{font-weight:bold}"+
     "#watch-download{margin-left:10px}"+
     "#watch-low-quality-download{margin-left:4px}"+
    "");
   
    var btnDownloadButton=document.createElement("button");
    btnDownloadButton.id="watch-download";
    btnDownloadButton.className="yt-uix-button b";
    btnDownloadButton.title=AnotherYouTubeDownloaderTranslation.getTranslation(8);
    btnDownloadButton.innerHTML="<span class=\"yt-uix-button-content\">"+AnotherYouTubeDownloaderTranslation.getTranslation(9)+"</span>";
    if(btnDownloadButton.addEventListener)
     btnDownloadButton.addEventListener("click", AnotherYouTubeDownloader.toggleDownloadMenu, false);
    else if(btnDownloadButton.attachEvent)
     btnDownloadButton.attachEvent("onclick", AnotherYouTubeDownloader.toggleDownloadMenu);
    else if(btnDownloadButton)
     btnDownloadButton.onclick=AnotherYouTubeDownloader.toggleDownloadMenu;
    divWatchActions.appendChild(btnDownloadButton);
    
    if(AnotherYouTubeDownloader.$("watch-download-close") && AnotherYouTubeDownloader.$("watch-download-close").addEventListener){
     AnotherYouTubeDownloader.$("watch-download-close").addEventListener("click", AnotherYouTubeDownloader.toggleDownloadMenu, false);
    } else if(AnotherYouTubeDownloader.$("watch-download-close") && AnotherYouTubeDownloader.$("watch-download-close").attachEvent){
     AnotherYouTubeDownloader.$("watch-download-close").attachEvent("onclick", AnotherYouTubeDownloader.toggleDownloadMenu);
    } else if(AnotherYouTubeDownloader.$("watch-download-close")){
     AnotherYouTubeDownloader.$("watch-download-close").onclick=AnotherYouTubeDownloader.toggleDownloadMenu;
    }
     
    tblDownloadMenu=AnotherYouTubeDownloader.$("table-download-menu");
   }
  }
  return tblDownloadMenu;
 },
 getType: function(type){
  if(type.indexOf(";")!=-1)
   type=type.substring(0,type.indexOf(";"));
  if(type.indexOf("/")!=-1)
   type=type.substring(type.indexOf("/")+1);
  switch(type){
   case "webm":
    type="WebM";
    break;
   case "mp4":
    type="MP4";
    break;
   case "x-flv":
    type="FLV";
    break;
   case "3gpp":
    type="3GP";
    break;
  }
  return type;
 },
 getHeight: function(resolution){
  if(resolution.indexOf("x")!=-1)
   resolution=resolution.substring(resolution.indexOf("x")+1)+"p";
  return resolution;
 },
 maintainTableCells: function(tblTable){
  var intCols=0;
  var i=0;
  for(i=0;i<tblTable.rows.length;i++){
   if(intCols<tblTable.rows[i].cells.length)
    intCols=tblTable.rows[i].cells.length;
  }
  for(i=0;i<tblTable.rows.length;i++){
   while(tblTable.rows[i].cells.length<intCols){
    tblTable.rows[i].insertCell(tblTable.rows[i].cells.length).innerHTML="";
   }
  }
 },
 addDownloadLink: function(url, type, resolution, quality, stereo3d, itag){
  var tblMenu=AnotherYouTubeDownloader.getDownloadMenu();
  if(!tblMenu){
   return;
  }
  var strHType=AnotherYouTubeDownloader.getType(type);
  var strHHeight=AnotherYouTubeDownloader.getHeight(resolution);
  var rowHeights=tblMenu.rows[0];
  var i;
  
  var intHeightIndex=-1; 
  for(i=1;i<rowHeights.cells.length;i++){
   if(rowHeights.cells[i].innerHTML==strHHeight)
    intHeightIndex=i;
  }
  if(intHeightIndex==-1){
   intHeightIndex=rowHeights.cells.length;
   rowHeights.insertCell(intHeightIndex).innerHTML=strHHeight;
   rowHeights.cells[intHeightIndex].className="bold";
  }
  
  var intTypeIndex=-1; 
  for(i=1;i<tblMenu.rows.length;i++){
   if(tblMenu.rows[i].cells[0] && tblMenu.rows[i].cells[0].innerHTML==strHType)
    intTypeIndex=i;
  }
  if(intTypeIndex==-1){
   intTypeIndex=tblMenu.rows.length;
   var curRow=tblMenu.insertRow(intTypeIndex);
   curRow.insertCell(0).innerHTML=strHType;
   curRow.cells[0].className="bold";
  }
  AnotherYouTubeDownloader.maintainTableCells(tblMenu);
  var strNewLink=url;
  if(AnotherYouTubeDownloader.getVideoTitle()!="")
   strNewLink=strNewLink.substring(0,strNewLink.indexOf("?")+1)+"title="+escape(AnotherYouTubeDownloader.getVideoTitle())+"&"+strNewLink.substring(strNewLink.indexOf("?")+1)
  var tdCell=tblMenu.rows[intTypeIndex].cells[intHeightIndex];
  tdCell.innerHTML=""+
   "<a href=\""+strNewLink+"\" title=\""+resolution+", "+type.replace(/\"/g,"'")+", "+quality+" quality"+(stereo3d==1?", stereo3d audio":"")+", itag "+itag+"\">"+(url.indexOf("rtmpe://")==0?AnotherYouTubeDownloaderTranslation.getTranslation(10):AnotherYouTubeDownloaderTranslation.getTranslation(9))+"</a>"+(url.indexOf("rtmpe://")==0?"/<a href=\""+location.protocol+strNewLink.substr(6)+"\" title=\""+resolution+", "+type.replace(/\"/g,"'")+", "+quality+" quality"+(stereo3d==1?", stereo3d audio":"")+", itag "+itag+"\">"+AnotherYouTubeDownloaderTranslation.getTranslation(9)+"</a>":"")+
  "";
  
  if(AnotherYouTubeDownloader.blHelperInstalled){
   tdCell.appendChild(document.createTextNode(" ("));
   
   var aFileSizeLink=document.createElement("a");
   aFileSizeLink.href="javascript:void(0);";
   aFileSizeLink.setAttribute("url","http:"+url.substr(6));
   aFileSizeLink.addEventListener("click",AnotherYouTubeDownloader.fetchFileSize,false);
   aFileSizeLink.innerHTML="?";
   aFileSizeLink.title="Find file size of this download link";
   tdCell.appendChild(aFileSizeLink);
   
   tdCell.appendChild(document.createTextNode(")"));
   
  }
 },
 fetchFileSize: function(){
  var me=this;
  var url=me.getAttribute("url");
  me.innerHTML="...";
  me.title="Loading...";
  me.removeEventListener("click",AnotherYouTubeDownloader.fetchFileSize,false);
  GM_xmlhttpRequest({
   method : "GET",
   url: "http://127.0.0.1:9688/"+url,
   headers: {
    "Referer": location.href // If cookies are cleared after page is loaded, this will lead to 403 Forbidden. Better disable cookies.
   },
   onload: function (res){
    var lngFileSize=parseInt(res.responseText);
    var strFileSize="";
    if(lngFileSize==-2){
     me.innerHTML="!2";
     me.title="Helper application was unable to connect. Check internet settings.";
     me.addEventListener("click",AnotherYouTubeDownloader.fetchFileSize,false);
     return;
    }
    if(lngFileSize==-3){
     me.innerHTML="!3";
     me.title="Helper application does not support this protocol.";
     me.addEventListener("click",AnotherYouTubeDownloader.fetchFileSize,false);
     return;
    }
    if(lngFileSize==-4){
     me.innerHTML="!4";
     me.title="Helper application denied checking file size for this url.";
     me.addEventListener("click",AnotherYouTubeDownloader.fetchFileSize,false);
     return;
    }
    if(lngFileSize==-1){
     strFileSize="Unknown";
    } else if(lngFileSize<9999){
     strFileSize=lngFileSize+" bytes";
    } else if(lngFileSize<9999*1024){
     strFileSize=(Math.round(lngFileSize/10.24)/100)+" KB";
    } else if(lngFileSize<9999*1024*1024){
     strFileSize=(Math.round(lngFileSize/(10.24*1024))/100)+" MB";
    } else {
     strFileSize=(Math.round(lngFileSize/(10.24*1024*1024))/100)+" GB";
    }
    me.removeAttribute("href");
    me.style.textDecoration="none";
    me.style.color="auto";
    me.innerHTML=strFileSize;
    me.title=strFileSize;
   },
   onerror: function (res){
    me.innerHTML="!1";
    me.title="Unable to fetch file size. Make sure Helper application is running and browser is online.";
    me.addEventListener("click",AnotherYouTubeDownloader.fetchFileSize,false);
   }
  });
 },
 getVideoTitle: function(){
  var spanEowTitle;
  var strReturnValue="";
  if(AnotherYouTubeDownloader.isWatchPage()){
   spanEowTitle=AnotherYouTubeDownloader.$("eow-title");
   if(spanEowTitle && spanEowTitle.title)
    strReturnValue=spanEowTitle.title;
  } else if (AnotherYouTubeDownloader.isUserChannelPage()){
   spanEowTitle=AnotherYouTubeDownloader.$("playnav-curvideo-title");
   if(spanEowTitle && spanEowTitle.textContent)
    strReturnValue=spanEowTitle.textContent.trim();
  }
  return strReturnValue.replace(/(\"|\*|\:|\<|\>|\?|\||\\|\/)/g,"_");
 },
 domChanged: function(){
  setTimeout(function (){
   AnotherYouTubeDownloader.fetchDownloadLinks();
  },0);
 },
 addCSS: function(css){
  if (typeof GM_addStyle != "undefined") {
   GM_addStyle(css);
  } else if (typeof PRO_addStyle != "undefined") {
   PRO_addStyle(css);
  } else if (typeof addStyle != "undefined") {
   addStyle(css);
  } else {
   var heads = AnotherYouTubeDownloader.$$("head");
   if (heads.length > 0) {
    var node = document.createElement("style");
    node.type = "text/css";
    try{
     node.appendChild(document.createTextNode(css));
    }catch(e){}
    heads[0].appendChild(node); 
   }
  }
 },
 runScript: function(){
  if(!document.body.innerHTML)
   return;
  if(AnotherYouTubeDownloader.blHelperInstalled && !AnotherYouTubeDownloader.isGreasemonkey())
   AnotherYouTubeDownloader.blHelperInstalled=false;
  if(AnotherYouTubeDownloader.isGreasemonkey()){
   GM_registerMenuCommand("Another YouTube Downloader -> "+AnotherYouTubeDownloaderTranslation.getTranslation(11),AnotherYouTubeDownloader.gmShowHideLQLinks);
  }
  if(AnotherYouTubeDownloader.isWatchPage()){
   AnotherYouTubeDownloader.fetchDownloadLinks();
  } else if (AnotherYouTubeDownloader.isUserChannelPage()){
   if(document.body.addEventListener)
    document.body.addEventListener("DOMNodeInserted",AnotherYouTubeDownloader.domChanged,false);
  }
 }
};

AnotherYouTubeDownloader.runScript();