Userscripts.org

There are 2 previous versions of this script.

// ==UserScript==
// @name           GoogleFaces
// @namespace      http://userscripts.org/users/23652
// @description    Adds a link to switch to Google's Face Search
// @include        http://images.google.com/images?*
// @copyright     JoeSimmons
// ==/UserScript==

// Inspired by Remy_Porter's script, but doesn't contain any of his code

var out, theLink, i;

  out = location.href.replace(/&imgtype=face/g, '').replace(/&imgtype=all/g, '');
  theLink = document.createElement("a");
  theLink.appendChild(document.createElement("br"));
  
if(location.href.indexOf("&imgtype=face") == -1)
  {
  theLink.appendChild(document.createTextNode("Faces Only"));
  theLink.href = out + '&imgtype=face';
  }
  else
  {
  theLink.appendChild(document.createTextNode("All images"));
  theLink.href = out + '&imgtype=all';
  }
  
  theLink.className = 'bluelink';
  document.evaluate("//a[starts-with(@href, '/preferences?q=')]",document,null,9,null).singleNodeValue.parentNode.parentNode.appendChild(theLink);

GM_addStyle('a.bluelink {color: blue; font-size:10px}');