From faa6de0a81808f453455107d06f4813fe6a2939d Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Mon, 29 Apr 2013 14:10:15 -0400
Subject: [PATCH] Make sure we don't bubble up past the body element.

---
 unpacked/extensions/MathZoom.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/unpacked/extensions/MathZoom.js b/unpacked/extensions/MathZoom.js
index 9397eb589..8112b62ba 100644
--- a/unpacked/extensions/MathZoom.js
+++ b/unpacked/extensions/MathZoom.js
@@ -229,8 +229,8 @@
           overlay = document.getElementById("MathJax_ZoomOverlay");
       var xy = ZOOM.getXY(div);
       var obj = div.parentNode, overflow = ZOOM.getOverflow(obj);
-      while (obj.parentNode && overflow === "visible") {
-        obj = obj.parentNode;
+      while (obj.parentNode && obj !== document.body && overflow === "visible") {
+        obj = obj.parentNode
         overflow = ZOOM.getOverflow(obj);
       }
       if (overflow !== "visible") {