$(document).ready(function(){
	
 $("a[rel=lightbox]").lightBox(); // Select all links that contains lightbox in the attribute rel
 
 $("a.preview-disabled").hover(
  function () {
   $(this).css("background-image",$(this).css("background-image").replace("thumb_grayscale","thumb"));
  }, 
  function () {
   $(this).css("background-image",$(this).css("background-image").replace("thumb","thumb_grayscale"));
  }
 );

});