diff -ur jsMath-2.3b-lowercase-mozfix/jsMath-controls.html jsMath-2.3b-xhtml/jsMath-controls.html
--- jsMath-2.3b-lowercase-mozfix/jsMath-controls.html	2005-10-31 08:41:27.000000000 -0800
+++ jsMath-2.3b-xhtml/jsMath-controls.html	2005-10-31 08:41:22.000000000 -0800
@@ -76,7 +76,7 @@
   Main: function () {
     this.oldCookie = {}; jsMath.Add(this.oldCookie,this.cookie);
     this.panel.innerHTML = ""; // for MSIE on the Mac
-    this.panel.innerHTML = document.getElementById("jsMath.panel").innerHTML;
+    this.panel.appendChild(document.getElementById("jsMath.panel").cloneNode(true));
 
     jsMath.Element("fontType").innerHTML =
       ({tex:"TeX",
@@ -109,7 +109,7 @@
 
   Options: function () {
     this.panel.innerHTML = ""; // for MSIE on the Mac
-    this.panel.innerHTML = document.getElementById("jsMath.options").innerHTML;
+    this.panel.appendChild(document.getElementById("jsMath.options").cloneNode(true));
     jsMath.Element("scale").value = this.cookie.scale;
     jsMath.Element("keep").value = this.cookie.keep;
     for (var id in {autofont:1, scaleImg:1, alpha:1, warn:1, button:1}) {
diff -ur jsMath-2.3b-lowercase-mozfix/jsMath.js jsMath-2.3b-xhtml/jsMath.js
--- jsMath-2.3b-lowercase-mozfix/jsMath.js	2005-10-31 08:41:28.000000000 -0800
+++ jsMath-2.3b-xhtml/jsMath.js	2005-10-31 09:03:22.000000000 -0800
@@ -289,7 +289,9 @@
    */
   Script: function (file) {
     if (!file.match('^([a-zA-Z]+:/)?/')) {file = jsMath.root + file}
-    document.write('<script src="'+file+'"></script>');
+    var loader = document.createElement("script");
+    loader.src = file;
+    document.getElementsByTagName('body')[0].appendChild(loader);
   },
   
   /*
@@ -297,7 +299,7 @@
    */
   HTML: function () {
     jsMath.hidden = this.TopHTML("Hidden",{'class':"normal"},{
-      position:"absolute", top:0, left:0, border:0, padding:0, margin:0
+       position:"absolute", top:0, left:0, border:0, padding:0, margin:0
     });
     return;
   },
@@ -413,9 +415,10 @@
       styles = jsMath.styles;
       styles['.jsM_scale'] = 'font-size:'+jsMath.Controls.cookie.scale+'%';
     }
-    document.writeln('<style type="text/css" id="jsMath.styles">');
-    for (var id in styles) {document.writeln('  '+id+'  {'+styles[id]+'}')}
-    document.writeln('</style>');
+    var style = '<style type="text/css" id="jsMath.styles">';
+    for (var id in styles) { style += '  '+id+'  {'+styles[id]+'}\n'}
+    style += '</style>'
+    jsMath.writehead(style);
   },
   
   /*
@@ -437,7 +440,7 @@
     jsMath.Setup.User();  //  do user-specific initialization
 
     //make sure browser-specific loads are done before this
-    document.write('<script>jsMath.Font.Check()</script>');
+    jsMath.write('<script>jsMath.Font.Check()</script>');
     
     this.inited = 1;
   },
@@ -996,7 +999,7 @@
     if (!jsMath.Browser.msieButtonBug) {this.Button()}
       else {setTimeout("jsMath.Controls.Button()",500)}
     if (jsMath.Browser.safariIFRAMEbug) {
-      document.write(
+      jsMath.write(
          '<iframe src="'+jsMath.root+'/jsMath-controls.html" '
          + 'id="jsMath.Frame" scrolling="no" '
          + 'style="visibility:hidden; position:absolute; width:1em; height:1em;">'
@@ -1012,7 +1015,7 @@
       document.body.insertBefore(frame,this.panel);
       this.iframe = frame;
     } catch (err) {
-      document.write('<iframe src="" id="jsMath.Frame" scrolling="no" '
+      jsMath.write('<iframe src="" id="jsMath.Frame" scrolling="no" '
          + 'style="visibility:hidden; position:absolute; width:1em; height:1em;">'
          + '</iframe>\n');
     }
@@ -2078,7 +2081,7 @@
       if (window.location.protocol != 'file:') {jsMath.Controls.SetCookie(0)}
       if (jsMath.Browser.alphaPrintBug) {jsMath.Controls.cookie.alpha = 0}
     }
-    document.writeln('<script src="'+this.URL(name,"")+'"></script>');
+    jsMath.write('<script src="'+this.URL(name,"")+'"></script>');
     this.loaded = 1;
   }
   
@@ -2099,9 +2102,11 @@
    *  using 0 when the value is near zero.
    */
   Em: function (m) {
+    //if(isnan(m)) { alert("jsMath.HTML.Em passed a NaN"); }
     var n = 5; if (m < 0) {n++}
     if (Math.abs(m) < .000001) {m = 0}
     var s = String(m); s = s.replace(/(\.\d\d\d).+/,'$1');
+    //alert("Em("+m+")="+s+"em");
     return s+'em'
   },
 
@@ -5297,11 +5302,16 @@
     } else if (name.match(/withdelims$/)) {
       this.mlist.data.overF.left  = this.GetDelimiter(this.cmd+name); if (this.error) return;
       this.mlist.data.overF.right = this.GetDelimiter(this.cmd+name); if (this.error) return;
+    } else {
+      this.mlist.data.overF.left  = null;
+      this.mlist.data.overF.right = null;
     }
     if (name.match(/^above/))
     {
       this.mlist.data.overF.thickness = this.GetDimen(this.cmd.name,1);
       if (this.error) return;
+    } else {
+      this.mlist.data.overF.thickness = null; 
     }
   },
 
@@ -5675,6 +5685,32 @@
 /*
  *  Initialize everything
  */
+
+jsMath.domparser = new DOMParser();
+try { 
+    document.write(""); 
+    jsMath.write = function(s) { document.write(s); }
+    jsMath.writehead = function(s) { document.write(s); }
+}
+catch(err) {
+    jsMath.write = function(s) {
+        var newelement = jsMath.domparser.parseFromString(
+            '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><body>'
+            +s+'</body></html>','application/xhtml+xml');
+        var appendme = newelement.firstChild.firstChild.firstChild;  // node is
+            // Document, child is html, child of child is body, child of child of
+            // child is the requested text.
+        document.getElementsByTagName('body')[0].appendChild(appendme);
+    }
+    jsMath.writehead = function(s) {
+        var newelement = (new DOMParser()).parseFromString(
+            '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head>'
+            +s+'</head></html>','application/xhtml+xml');
+        var appendme = newelement.firstChild.firstChild.firstChild;
+        document.getElementsByTagName('head')[0].appendChild(appendme);
+    }
+}
+
 jsMath.Loaded();
 jsMath.Controls.GetCookie();
 if (document.body) {jsMath.Setup.Body()}
Only in jsMath-2.3b-xhtml/: .jsMath.js.swl
Only in jsMath-2.3b-xhtml/: .jsMath.js.swm
Only in jsMath-2.3b-xhtml/: .jsMath.js.swn
Only in jsMath-2.3b-xhtml/: .jsMath.js.swo
Only in jsMath-2.3b-xhtml/: .jsMath.js.swp