function convertMath(node) {// for Gecko
    if (node.nodeType==1) {
        var newnode =
                document.createElementNS("http://www.w3.org/1998/Math/MathML",
                        node.nodeName.toLowerCase());
        for(var i=0; i < node.attributes.length; i++)
            newnode.setAttribute(node.attributes[i].nodeName,
                    node.attributes[i].nodeValue);
        for (var i=0; i<node.childNodes.length; i++) {
            var st = node.childNodes[i].nodeValue;
            if (st==null || st.slice(0,1)!=" " && st.slice(0,1)!="\n")
                newnode.appendChild(convertMath(node.childNodes[i]));
        }
        return newnode;
    }
    else return node;
}

/**
 * Use this method if you have mathml tags using the 'm' namespace.
 * Example: <m:math>
 */
function convertM() {
    var i,j,k;
    if (document.createElementNS == null)
        return;
    var mmlnode = document.getElementsByTagName("m:math");
    k = mmlnode.length;
    for (i=0; i< k; i++) {
        if (mmlnode.length < k)
            j= 0;
        else j = i;
        mmlnode[j].parentNode.replaceChild(convertMath(mmlnode[j]),mmlnode[j]);
    }
}

/**
 * Prepends m: to math ml tags.
 * NOTE: Including the ns xmlns="http://www.w3.org/1998/Math/MathML" in IE
 * breaks this method.
 */
function convert() {
    var mmlnode = document.getElementsByTagName("math");
    var st,str,node,newnode;
    for (var i=0; i<mmlnode.length; i++)
    {
        if (document.createElementNS!=null)
            mmlnode[i].parentNode.replaceChild(convertMath(mmlnode[i]),mmlnode[i]);
        else { // convert for IE
            str = "";
            node = mmlnode[i];
            while (node.nodeName!="/MATH") {
                st = node.nodeName.toLowerCase();
                if (st=="#text") str += node.nodeValue;
                else {
                    str += (st.slice(0,1)=="/" ? "</m:"+st.slice(1) : "<m:"+st);
                    if (st.slice(0,1)!="/")
                        for(var j=0; j < node.attributes.length; j++)
                            if (node.attributes[j].nodeValue!="italic" &&
                                node.attributes[j].nodeValue!="" &&
                                node.attributes[j].nodeValue!="inherit" &&
                                node.attributes[j].nodeValue!=undefined)
                                str += " "+node.attributes[j].nodeName+"="+
                                       "\""+node.attributes[j].nodeValue+"\"";
                    str += ">";
                }
                node = node.nextSibling;
                node.parentNode.removeChild(node.previousSibling);
            }
            str += "</m:math>";
            newnode = document.createElement("span");
            node.parentNode.replaceChild(newnode,node);
            newnode.innerHTML = str;
        }
    }
}