diff --git a/js/media_crop.image_replace.js b/js/media_crop.image_replace.js
index 0347e91..dceaeb3 100644
--- a/js/media_crop.image_replace.js
+++ b/js/media_crop.image_replace.js
@@ -14,10 +14,14 @@
         var img = $('#' + id);
         if (img.length == 0) {
           $('iframe').each(function () {
-            var iimg = $(this).contents().find('#' + id);
-            if (iimg.length > 0) {
-              img = iimg;
+            // There can be iframes from other domains on the page.
+            try {
+              var iimg = $(this).contents().find('#' + id);
+              if (iimg.length > 0) {
+                img = iimg;
+              }
             }
+            catch (e) {}
           });
         }
         var src = (img.attr('src') || '');