Tumblr - Upload Photo button for all posts

// ==UserScript==
// @name           Tumblr post - Upload Photo for all posts
// @namespace      http://pseudofailure.tumblr.com/
// @description    Adds the "+ Upload Photo" option to all types of posts. 
// @include        http://www.tumblr.com/new/photo
// @include        http://www.tumblr.com/new/quote
// @include        http://www.tumblr.com/new/link
// @include        http://www.tumblr.com/new/audio
// @include        http://www.tumblr.com/new/video
// @include        http://www.tumblr.com/reblog/*
// @include        http://www.tumblr.com/edit/*
// @include        http://www.tumblr.com/messages
// @include        http://www.tumblr.com/inbox
// @include        http://www.tumblr.com/tumblelog/*/new/*
// @include        http://www.tumblr.com/tumblelog/*/new/text
// @include        http://www.tumblr.com/tumblelog/*/messages
// @include        http://www.tumblr.com/blog/*/new/*
// @include        http://www.tumblr.com/blog/*/new/text
// @include        http://www.tumblr.com/blog/*/messages
// @exclude        http://www.tumblr.com/new/text
// @version        1.2.1
// ==/UserScript==



var pathname = window.location.pathname;
var textarea;
if(pathname.indexOf("/messages") == -1 && pathname.indexOf("/inbox") == -1){
 if(pathname.indexOf("/new/photo") >= 0 || pathname.indexOf("/new/quote") >= 0 || pathname.indexOf("/new/audio") >= 0 || pathname.indexOf("/new/video") >= 0){
  textarea = document.getElementById('post_two');
 }
 else if(pathname.indexOf("/new/link") >= 0){
  textarea = document.getElementById('post_three');
 }
 else if(pathname.indexOf("reblog") != -1){
  h1Search = document.getElementsByTagName('h1');
  if(h1Search.length > 0){
   title = h1Search[0].innerHTML;
   title = title.toLowerCase();
   if(title.indexOf("reblog photo") != -1 || title.indexOf("reblog quote") != -1 || title.indexOf("reblog audio") != -1 || title.indexOf("reblog video") != -1){
    textarea = document.getElementById('post_two');
   }
   else if(title.indexOf("reblog link") != -1){
    textarea = document.getElementById('post_three');
   }
   else{
   }
  }
  else{
   
  }
 }
 else if(pathname.indexOf("edit") != -1){
  h1Search = document.getElementsByTagName('h1');
  if(h1Search.length > 0){
   title = h1Search[0].innerHTML;
   title = title.toLowerCase();
   if(title.indexOf("edit photo") != -1 || title.indexOf("edit quote") != -1 || title.indexOf("edit audio") != -1 || title.indexOf("edit video") != -1 || title.indexOf("edit answer") != -1){
    textarea = document.getElementById('post_two');
   }
   else if(title.indexOf("edit link") != -1){
    textarea = document.getElementById('post_three');
   }
   else{
   }
  }
  else{
   
  }
 }
 else{
  //
 }
 if(textarea){
  if(pathname.indexOf("/new/link") >= 0 || document.getElementsByTagName('h1')[0].innerHTML.toLowerCase().indexOf("reblog link") != -1 || document.getElementsByTagName('h1')[0].innerHTML.toLowerCase().indexOf("edit link") != -1){
   var headID = document.getElementsByTagName("head")[0];         
   var newScript = document.createElement('script');
   newScript.type = 'text/javascript';
   newScript.text = 'function catch_uploaded_photo(src) {' + 
    ' if (tinyMCE && (ed = tinyMCE.get(\'post_three\'))) {' + 
    '  ed.execCommand(\'mceInsertContent\', false, \'<img src="\' + src + \'" />\');' +   
    ' } else {' + 
    '  insertTag(\'post_three\', \'<img src="\' + src + \'" />\');' + 
    ' }' + 
    '}';
   headID.appendChild(newScript);
  }
  else{
   var headID = document.getElementsByTagName("head")[0];         
   var newScript = document.createElement('script');
   newScript.type = 'text/javascript';
   newScript.text = 'function catch_uploaded_photo(src) {' + 
    ' if (tinyMCE && (ed = tinyMCE.get(\'post_two\'))) {' + 
    '  ed.execCommand(\'mceInsertContent\', false, \'<img src="\' + src + \'" />\');' +   
    ' } else {' + 
    '  insertTag(\'post_two\', \'<img src="\' + src + \'" />\');' + 
    ' }' + 
    '}';
   headID.appendChild(newScript);
  }
  /*  Some of the following code has been taken from,
   or has been writen using reference from,
   Cutlerish's Missing-e extenion. 
   
   I swear I tried these methods myself, but it didn't
   work until I tried it again using his. Either way, 
   I hod to do a bunch of tweaking to get it to actually 
   function at all. 
   
   The main thing I got from his was the "/upload" src,
   and the code for the second level iframe, but that's just
   copied from the "/upload/image", as far as I can tell, 
   and that's what I would have done (and had done in previous
   attempts) anyway. 
   */
  
  newDiv = document.createElement('div');
  //newDiv.style = "float:right;padding-top:3px;";
  newDiv.style.cssFloat = "right";
  newDiv.style.paddingTop = "3px";
  //newDiv.innerHTML = '<iframe src="/upload/image" id="regular_form_inline_image_iframe" width="130" height="16" border="0" scrolling="no" allowtransparency="true" frameborder="0" style="background-color:transparent; overflow:hidden;"></iframe>';
  newDiv.innerHTML = '<iframe src="/upload" id="regular_form_inline_image_iframe" width="130" height="16" border="0" scrolling="no" allowtransparency="true" frameborder="0" style="background-color:transparent; overflow:hidden;" onload="uploadFrame = document.getElementById(\'regular_form_inline_image_iframe\'); var content = uploadFrame.contentWindow.document; content.open(); content.write(\'<html><head><style type=\\\'text/css\\\'>* { margin:0;padding:0; }</style> <script type=\\\'text/javascript\\\'> function catch_uploaded_photo(src) { parent.catch_uploaded_photo(src);}</script></head><body><iframe src=\\\'http://www.tumblr.com/upload/image?from_assets\\\' width=\\\'130\\\' height=\\\'16\\\' border=\\\'0\\\' scrolling=\\\'no\\\' allowtransparency=\\\'true\\\' frameborder=\\\'0\\\' style=\\\'background-color:transparent;overflow:hidden;\\\'></iframe></body></html>\'); content.close();"></iframe>';

  textarea.parentNode.insertBefore(newDiv,textarea);

  uploadFrame = document.getElementById('regular_form_inline_image_iframe');
  
  newDiv2 = document.createElement('div');
  newDiv2.style.clear = "both";
  textarea.parentNode.insertBefore(newDiv2,textarea);
  //uploadFrame.addEventListener('onLoad', theFunction, true); 
  
  
  /*var upload = document.createElement("div");
  upload.innerHTML = '<div style="float:right; padding-top:3px; padding-bottom: 5px;">' + 
   ' <iframe src="/upload/image?from_assets" id="regular_form_inline_image_iframe"' + 
   ' width="111" height="16" border="0" scrolling="no" allowTransparency="true"' + 
   ' frameborder="0" style="background-color:transparent; overflow:hidden;"></iframe>' + 
   '</div>' + 
   '<div class="clear"></div>';
  textarea.parentNode.insertBefore(upload,textarea);*/
 }
}
else if(pathname.indexOf("/messages") != -1 || pathname.indexOf("/inbox") != -1){
 allTextareas = document.evaluate("//textarea[@class='text_field']",document,null,XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,null);
 var headID = document.getElementsByTagName("head")[0];         
 var newScript = document.createElement('script');
 newScript.type = 'text/javascript';
 newScript.text = 'function catch_uploaded_photo(src) {' + 
    ' editorID = null;' +
    ' allTextareas = document.evaluate("//textarea[@class=\'text_field\']",document,null,XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,null);' +
    ' for (var i = 0; i < allTextareas.snapshotLength; i++) {' + 
    '  thisTextarea = allTextareas.snapshotItem(i); ' +
    '  textaID = thisTextarea.id; ' + 
    '  frameContents = document.getElementById("regular_form_inline_image_iframe_\"+textaID+\"").contentWindow.document.getElementsByTagName("html")[0].innerHTML; ' +
    '  if(frameContents.indexOf(src) != -1){ ' +
    '   editorID = textaID; ' + 
    '   break; ' +
    '  } ' +
    ' }'+
    ' if (tinyMCE && (ed'+i+' = tinyMCE.get(editorID))) {' +
    '  ed'+i+'.execCommand(\'mceInsertContent\', false, \'<img src="\' + src + \'" />\');' +   
    ' } else {' + 
    '  insertTag(editorID, \'<img src="\' + src + \'" />\');' + 
    ' }' + 
    '}';
 headID.appendChild(newScript);
 for (var i = 0; i < allTextareas.snapshotLength; i++) {
  thisTextarea = allTextareas.snapshotItem(i);
  taID = thisTextarea.id;
  var upload = document.createElement("div");
  upload.innerHTML = '<div style="float:right; padding-top:3px; padding-bottom: 5px;">' + 
   ' <iframe src="/upload/image?from_assets" id="regular_form_inline_image_iframe_'+taID+'"' + 
   ' width="111" height="16" border="0" scrolling="no" allowTransparency="true"' + 
   ' frameborder="0" style="background-color:transparent; overflow:hidden;"></iframe>' + 
   '</div>' + 
   '<div class="clear"></div>';
  thisTextarea.parentNode.insertBefore(upload,thisTextarea);
 }
}