Fix a couple of issues for IE (extra comma, wrong element name, and better handling of readyState)

unpacked/MathJax.js

@@ -1836,7 +1836,7 @@ MathJax.Hub.Startup = {
   onLoad: function (when) {
     var onload = this.onload =
       MathJax.Callback(function () {MathJax.Hub.Startup.signal.Post("onLoad")});
-    if (document.readyState && document.readyState !== "loading") {return [onload]}
+    if (document.body && document.readyState && document.readyState !== "loading") {return [onload]}
     if (window.addEventListener) {
       window.addEventListener("load",onload,false);
       if (!this.params.noDOMContentEvent)

unpacked/extensions/tex2jax.js

@@ -180,7 +180,7 @@ MathJax.Extension.tex2jax = {
     } else if (match[0].substr(0,4) === "\\ref" || match[0].substr(0,6) === "\\eqref") {
       this.search = {
         mode: "", end: "", open: element,
-        olen: 0, opos: this.pattern.lastIndex - match[0].length,
+        olen: 0, opos: this.pattern.lastIndex - match[0].length
       }
       return this.endMatch([""],element);
     } else {                                         // escaped dollar signs

unpacked/jax/output/HTML-CSS/jax.js

@@ -479,7 +479,7 @@
           test = this.getTestSpan(script);
           var W = test.lastChild.lastChild.offsetWidth,
               w = test.lastChild.lastChild.firstChild.offsetWidth;
-          math.HTMLCSS.marginScale = (2*w - W ? w/(2*w - W) : 1);
+          jax.HTMLCSS.marginScale = (2*w - W ? w/(2*w - W) : 1);
         }
       }
       //