Merge branch 'issue342' into develop

Resolves issue #342.

unpacked/MathJax.js

@@ -978,6 +978,8 @@ MathJax.HTML = {
       for (var i = 0; i < contents.length; i++) {
         if (contents[i] instanceof Array) {
           obj.appendChild(this.Element(contents[i][0],contents[i][1],contents[i][2]));
+        } else if (type === "script") { // IE throws an error if script is added as a text node
+          this.setScript(obj, contents[i]);
         } else {
           obj.appendChild(document.createTextNode(contents[i]));
         }