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 [] ;
	        }
	    }
	    else {
	        // ie
	        xml = { documentElement: this.createXML(xml.documentElement) };
	    }
	
	    this.onSuccess(text,xml);
	},
	
	createXML : function(xml, parent) {
	    if (! parent) parent = new Element(xml.nodeName);
	
	    var tmp;
	    for(var j = 0; j < xml.attributes.length; j++) {
	        tmp = xml.attributes[j];
	        parent.setProperty(tmp.nodeName, tmp.nodeValue);
	    }
	
	    if (! xml.childNodes.length) return parent;
	
	    var i, j, currChildNode;
	    for(i = 0; i < xml.childNodes.length; i++) {
	        currChildNode = xml.childNodes[i];
	
	        if (currChildNode.nodeType == 1) { // Element type
	            // NodeName
	            var el = new Element(currChildNode.nodeName);
	
	            // Attributes
	            if(currChildNode.attributes.length) {
	                for(j = 0; j < currChildNode.attributes.length; j++) {
	                    tmp = currChildNode.attributes[j];
	                    el.setProperty(tmp.nodeName, tmp.nodeValue);
	                }
	            }
	
	            // Value
	            el.set({'text' : currChildNode.firstChild.nodeValue});
	
	            parent.adopt(el);
	
	            if (currChildNode.childNodes.length) this.createXML(currChildNode, el);
	        }
	    }
	
	    return parent;
	}

});