this is the solution i used in my application
use this Request.XML create the instance for request xml file
Request.XML = new Class({
Extends: Request,
success: function(text, xml){
if(Browser.Features.xpath) {
xml.selectNodes = function(xpath){
var nodes = [];
var result = this.evaluate(xpath, this,
this.createNSResolver(xml.documentElement),
XPathResult.ORDERED_NODE_ITERATOR_TYPE, null) ;
if (result){
var node = result.iterateNext() ;
while(node){
nodes.push(node);
node = result.iterateNext();
}
}
return nodes;
}
xml.selectSingleNode = function(xpath){
var result = this.evaluate(xpath, this,
this.createNSResolver(this.documentElement), 9, null);
if (result && result.singleNodeValue) return result.singleNodeValue ;
else return [] ;
}
// ie
}else {
xml = this.createXML(xml.documentElement);
}
this.onSuccess(text, xml);
},
createXML : function(xml, parent) {
if(!$defined(parent)) {
parent = new Element(xml.nodeName);
}
if (xml.childNodes.length) {
for (var i = 0; i < xml.childNodes.length; i++) {
if (xml.childNodes[i].nodeType == 1) { // Element type
// NodeName
var el = new Element(xml.childNodes[i].nodeName);
// Attributes
if (xml.childNodes[i].attributes.length) {
for (var j = 0; j < xml.childNodes[i].attributes.length; j++) {
var property = xml.childNodes[i].attributes[j].nodeName;
var value = xml.childNodes[i].attributes[j].nodeValue;
el.setProperty(property, value);
}
}
// Value
if (xml.childNodes[i].firstChild) {
var text = xml.childNodes[i].firstChild.nodeValue;
if ($defined(text)){
el.set('text', text);
}
}
parent.adopt(el);
var son = xml.childNodes[i];
if (son.childNodes.length) {
this.createXML(son, el);
}
}
}
}
return parent;
}
});
