imagesLoaded() jquery plugin

gistfile1.js

// $('img.photo',this).imagesLoaded(myFunction)
// execute a callback when all images have loaded.
// needed because .load() doesn't work on cached images

// mit license. paul irish. 2010.
// webkit fix from Oren Solomianik. thx!

// callback function is passed the last image to load
//   as an argument, and the collection as `this`

// callback now gets fired when there are no img elems

$.fn.imagesLoaded = function(callback){
  var elems = this.filter('img'),
      len   = elems.length,
      blank = "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==";
	 
  if(len === 0) callback.call(this);
  else {
	  elems.bind('load',function(){
		 if (--len <= 0 && this.src !== blank){ callback.call(elems,this); }
	  }).each(function(){
		// cached images don't fire load sometimes, so we reset src.
		if (this.complete || this.complete === undefined){
		   var src = this.src;
		   // webkit hack from http://groups.google.com/group/jquery-dev/browse_thread/thread/eee6ab7b2da50e1f
		   // data uri bypasses webkit log warning (thx doug jones)
		   this.src = blank;
		   this.src = src;
		}		
	}); 
  }
  return this;
};