Blog

/*  
Copyright (c) 2010 Aza Raskin  
http://azarask.in  

Permission is hereby granted, free of charge, to any person  
obtaining a copy of this software and associated documentation  
files (the "Software"), to deal in the Software without  
restriction, including without limitation the rights to use,  
copy, modify, merge, publish, distribute, sublicense, and/or sell  
copies of the Software, and to permit persons to whom the  
Software is furnished to do so, subject to the following  
conditions:  

The above copyright notice and this permission notice shall be  
included in all copies or substantial portions of the Software.  
*/  

(function(){  

var TIMER = null;  
var HAS_SWITCHED = false;  

// Events  
window.onblur = function(){  
  TIMER = setTimeout(changeItUp, 5000);  
}  

window.onfocus = function(){  
  if(TIMER) clearTimeout(TIMER);  
}  

// Utils  
function setTitle(text){ document.title = text; }  

// This favicon object rewritten from:  
// Favicon.js - Change favicon dynamically http://ajaxify.com/run/favicon].  
// Copyright (c) 2008 Michael Mahemoff. Icon updates only work in Firefox and Opera.  

favicon = {  
  docHead: document.getElementsByTagName("head")[0],  
  set: function(url){  
  this.addLink(url);  
  },  
   
  addLink: function(iconURL) {  
  var link = document.createElement("link");  
  link.type = "image/x-icon";  
  link.rel = "shortcut icon";  
  link.href = iconURL;  
  this.removeLinkIfExists();  
  this.docHead.appendChild(link);  
  },  

  removeLinkIfExists: function() {  
  var links = this.docHead.getElementsByTagName("link");  
  for (var i=0; i<links.length; i++) {  
  var link = links[i];  
  if (link.type=="image/x-icon" && link.rel=="shortcut icon") {  
  this.docHead.removeChild(link);  
  return; // Assuming only one match at most.  
  }  
  }  
  },  
   
  get: function() {  
  var links = this.docHead.getElementsByTagName("link");  
  for (var i=0; i<links.length; i++) {  
  var link = links[i];  
  if (link.type=="image/x-icon" && link.rel=="shortcut icon") {  
  return link.href;  
  }  
  }  
  }  
};  

function createShield(){  
  div = document.createElement("div");  
  div.style.position = "fixed";  
  div.style.top = 0;  
  div.style.left = 0;  
  div.style.backgroundColor = "white";  
  div.style.width = "100%";  
  div.style.height = "100%";  
  div.style.textAlign = "center";  
  document.body.style.overflow = "hidden";  
   
  img = document.createElement("img");  
  img.style.paddingTop = "15px";  
  img.src = "http://img.skitch.com/20100524-b639xgwegpdej3cepch2387ene.png";  
   
  var oldTitle = document.title;  
  var oldFavicon = favicon.get() || "/favicon.ico";  
   
  div.appendChild(img);  
  document.body.appendChild(div);  
  img.onclick = function(){  
  div.parentNode.removeChild(div);  
  document.body.style.overflow = "auto";  
  setTitle(oldTitle);  
  favicon.set(oldFavicon)  
  }  
   

}  

function changeItUp(){  
  if( HAS_SWITCHED == false ){  
  createShield("https://mail.google.com");  
  setTitle( "Gmail: Email from Google");  
  favicon.set("https://mail.google.com/favicon.ico");  
  HAS_SWITCHED = true;  
  }  
}  
   
   
})()