twitter instagram preview (greasemonkey)

gistfile1.js

// ==UserScript==
// @name        twitter instagram previewer
// @namespace   http://scturtle.me/
// @version     1
// @match       https://twitter.com/*
// @require     http://code.jquery.com/jquery.min.js
// @require     http://www.jqui.net/demo/mutate/mutate.events.js
// @require     http://www.jqui.net/demo/mutate/mutate.min.js
// ==/UserScript==

//var GM_log = unsafeWindow.console.log;
$(document.documentElement).mutate('scrollHeight', function(){
  //console.log(document.documentElement.scrollHeight);
  $('.js-tweet-text').each(function(key, value){
    if(value.innerHTML.indexOf('instagr.am')>=0){
      instagram = value.innerHTML.split('http://instagr.am/p/');
      instagram = instagram[1].split('/')[0];
      p = value.parentNode.parentNode;
      v = p.getAttribute('data-expanded-footer');
      if(v.indexOf('http://instagr.am/p/')==-1){
          pos = v.indexOf('\n');
          // embr pic
          p.setAttribute('data-expanded-footer', v.substr(0,pos)+
            '<div style="margin-top:10px;"><img width="435" src="http://instagr.am/p/'
            +instagram+'/media"/></div>'+
            v.substr(pos,v.length));
          // icon
          value.parentNode.children[2].children[1].children[0].innerHTML='<i class="sm-image"></i>';
      }
    }
  });
});