JSON to XML serializer

json2xml.js

// A serialization of a JavaScript object to XML
// TODO: test suite
function json2xml(o, tab) {
    var xml=[], addChild = function(name, v, ind) {
        var childs;
        if (v instanceof Array) {
            for (var i=0, n=v.length; i<n; i++)
                addChild(name, v[i], ind);
        } else if (typeof(v) == "object") {
            xml.push(ind, "<", name);
            childs = [];
            for (var p in v) {
                if (!v.hasOwnProperty(p))
                    continue;
                if (p.charAt(0) == "@")
                    xml.push(" ", p.substr(1), '="', v[p].toString().replace('&', '&amp;').replace('"', '&quot;'), '"');
                else
                    childs.push(p);
            }
            xml.push( childs.length ? ">" : "/>" );
            if (childs.length) {
                for (var i=0, n=childs.length, p; i<n; i++) {
                    p = childs[i];
                    if (p == "#text")
                        xml.push(v[p].toString().replace('&', '&amp;').replace('<', '&lt;'));
                    else if (p == "#cdata")
                        xml.push('<![CDATA[', v[p].toString().replace(']]'+'>', ']]]]'+'><![CDATA[>'), ']]'+'>');
                    else
                        addChild(p, v[p], ind+tab);
                }
                if (/[>\n]$/.test(xml[xml.length-1]))
                    xml.push(ind);
                xml.push('</', name, '>');
            }
        } else {
            xml.push(ind, "<", name, ">", v.toString().replace('&', '&amp;').replace('<', '&lt;'), "</", name, ">");
        }
     };
     for (var m in o)
         addChild(m, o[m], "\n");
     xml.shift(); // Remove the first indent
     return xml.join('');
}