From 8ed92076683d61752ae7246845e0be73df4556a0 Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Thu, 20 Feb 2014 14:29:31 -0500
Subject: [PATCH] Don't use MathJax_MSIE_Frame for those vesions of IE that
 suppor position:fixed (7 and above, as it turns out).  Resolves issue #738.

---
 unpacked/MathJax.js                 | 6 ++++--
 unpacked/extensions/FontWarnings.js | 4 ++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/unpacked/MathJax.js b/unpacked/MathJax.js
index 2043bac56..3f9f3854b 100644
--- a/unpacked/MathJax.js
+++ b/unpacked/MathJax.js
@@ -1557,7 +1557,9 @@ MathJax.Message = {
   
   browsers: {
     MSIE: function (browser) {
-      MathJax.Hub.config.styles["#MathJax_Message"].position = "absolute";
+      MathJax.Message.msieFixedPositionBug = ((document.documentMode||0) < 7);
+      if (MathJax.Message.msieFixedPositionBug) 
+        {MathJax.Hub.config.styles["#MathJax_Message"].position = "absolute"}
       MathJax.Message.quirks = (document.compatMode === "BackCompat");
     },
     Chrome: function (browser) {
@@ -1580,7 +1582,7 @@ MathJax.Message = {
     }
     if (!this.div) {
       var frame = document.body;
-      if (MathJax.Hub.Browser.isMSIE && window.attachEvent) {
+      if (this.msieFixedPositionBug && window.attachEvent) {
         frame = this.frame = this.addDiv(document.body); frame.removeAttribute("id");
         frame.style.position = "absolute";
         frame.style.border = frame.style.margin = frame.style.padding = "0px";
diff --git a/unpacked/extensions/FontWarnings.js b/unpacked/extensions/FontWarnings.js
index cb5aa1da4..2d7726331 100644
--- a/unpacked/extensions/FontWarnings.js
+++ b/unpacked/extensions/FontWarnings.js
@@ -241,8 +241,8 @@
     if (HUB.Browser.isMSIE) {
       if (CONFIG.messageStyle.position === "fixed") {
         MathJax.Message.Init();  // make sure MathJax_MSIE_frame exists
-        frame = document.getElementById("MathJax_MSIE_Frame");
-        CONFIG.messageStyle.position = "absolute";
+        frame = document.getElementById("MathJax_MSIE_Frame") || frame;
+        if (frame !== document.body) {CONFIG.messageStyle.position = "absolute"}
       }
     } else {delete CONFIG.messageStyle.filter}
     CONFIG.messageStyle.maxWidth = (document.body.clientWidth-75) + "px";