function serializeDomNodeToXML(node) {
   if (node.nodeType == node.TEXT_NODE) {
        return node.nodeValue;
   }
   var ret = '<' + node.nodeName.toLowerCase() + ' ';
   if (node.attributes && node.attributes.length) {
      for (var i=0, l=node.attributes.length; ig,'"') + '" ';
      }
   }
   if (!node.childNodes || !node.childNodes.length) {
       ret += '/>';
   } else {
       ret += '>';
   }
   for (var i = 0, l = node.childNodes.length; i';
   }

   console.log(node, ret);
   return ret;
}
serializeDomNodeToXML(document.getElementById("js_Menu_siteSelectForm"));

https://weirdan.livejournal.com/69990.html