diff --git a/external.js b/external.js
index 98047ae..b922a37 100644
--- a/external.js
+++ b/external.js
@@ -1,6 +1,6 @@
 Drupal.behaviors.external = function(context) {
   // Open external links in new tabs.
-  $("a[href^=http://]", context).each(function() {
+  $("a[href^=http://]:not([rel*='lightbox'])", context).each(function() {
     if(this.href.toLowerCase().indexOf(location.hostname) == -1) {
       $(this).click(externalNewWindow);
     }