iemathml.js

// iemathml.js
// d.p.carlisle@gmail.com
// may be used under MIT license
// http://www.opensource.org/licenses/mit-license.php


function domath() {
    var mmlnodea = document.getElementsByTagName("math");
    var mmlnode = [];
    for( var i = 0; i < mmlnodea.length; i++ ) {
	mmlnode[mmlnode.length] = mmlnodea[i];
    }
    for (var i=0; i<mmlnode.length; i++) {
	var parent = mmlnode[i].parentNode;
	if(parent!=null){
	    var str=parent.innerHTML;
	    str = str.replace(/xmlns=.http:\/\/www.w3.org\/1998\/Math\/MathML./ig,'');
	    str = str.replace(/<\?XML:NAMESPACE[^<>]*>/ig,'');
	    str = str.replace(/<\/(none|mprescripts|mglyph|mspace|msline|maligngroup|malignmark)[^<>]*>/ig,'');
	    str = str.replace(/<(mtd)([^<>]*)>(?=\s*<mtd)/ig,'<$1$2></$1>');
	    str = str.replace(/(<\/mtd>)+<\/mtr>/ig,'</mtd></mtr>');
	    str = str.replace(/<(none|mprescripts|mglyph|mspace|msline|maligngroup|malignmark)([^<>]*)>/ig,'<$1$2></$1>');
	    str = str.replace(/<\/?(m\w+|none)/ig,function(w){return (w.toLowerCase()).replace(/(<\/?)/,'$1m:')});
	    parent.innerHTML = (str);
	}
    }
}


function convertie(node) {
    if (node.nodeType==1) {
	var newnode = 
	    document.createElement("m:" + node.nodeName);
	for(var i=0; i < node.attributes.length; i++)
	    newnode.setAttribute(node.attributes[i].nodeName,
				 node.attributes[i].nodeValue);
	var cnode = [];
	for( var i = 0; i <node.childNodes.length; i++ ) {
	    cnode[cnode.length] = node.childNodes[i];
	}
	for (var i=0; i<cnode.length; i++) {
	    newnode.appendChild(convertie(cnode[i]));
	}
	return newnode;
    }
    else return node;
}

function domath10() {
    var mp = document.createElement("object");
    mp.id = "mathplayer";
    mp.classid = "clsid:32F66A20-7614-11D4-BD11-00104BD3F987";
    document.getElementsByTagName("head")[0].appendChild(mp);
    document.namespaces.add("m","http://www.w3.org/1998/Math/MathML");
    document.namespaces.m.doImport("#mathplayer");
    var mmlnodea = document.getElementsByTagName("math");
    var mmlnode = [];
    for( var i = 0; i < mmlnodea.length; i++ ) {
	mmlnode[mmlnode.length] = mmlnodea[i];
    }
    for (var i=0; i<mmlnode.length; i++) {	
	mmlnode[i].parentNode.replaceChild(convertie(mmlnode[i]),mmlnode[i]);
    }
}


if (navigator.userAgent.match(/MSIE [6-9]/)) {
    document.write("<object id=\"mmlFactory\" classid=\"clsid:32F66A20-7614-11D4-BD11-00104BD3F987\"></object><?import namespace=\"m\" implementation=\"#mmlFactory\"?>");
    window.attachEvent("onload", domath);
}



if (navigator.userAgent.match(/MSIE 1[0-9]/)) {
    window.onload=domath10;
}