$.extend({
	youthumb: function( url, size ){
		if(url === null){ return ""; }
		
		size = (size === null) ? '3' : size;
		var vid;
		var results;
		
		results = url.match("[\\?&]v=([^&#]*)");
		
		vid = ( results === null ) ? url : results[1];
		
		return "http://img.youtube.com/vi/"+vid+"/"+size+".jpg";
	}
});