Getting back XML DOM Data

[Nibinaear]

I have a XMLHTTPResponse function like this which receives the returning XML and extracts the information for processing:

function handleServerResponse()
{
    // move forward only if the transaction has completed
    if (xmlHttp.readyState == 4)
    {
        // status of 200 indicates the transaction completed successfully
        if (xmlHttp.status == 200)
        {
            // extract the XML retrieved from the server
            xmlResponse = xmlHttp.responseXML;
            // obtain the document element (the root element) of the XML structure
            xmlDocumentElement = xmlResponse.documentElement;
            // get the text message, which is in the first child of
            // the the document element
            var product_node=xmlDocumentElement.firstChild;
            
            //var product_id = product_node.pr_id;
            
            var pr_name= product_node.firstChild.nodeValue;
            
            var pr_details= product_node.firstChild.nextSibling.nodeValue;
            
            // update the client display using the data received from the server
            document.getElementById("details_box").innerHTML = pr_name + "<p />" + pr_details;
            // restart sequence
            //setTimeout('process(produ)', 1000);
        }
        else
        {
            alert("There was a problem accessing the server: " + xmlHttp.statusText);
        }
    }
} 

It seems to work fine and I can traverse my tree and print out nodeName(s) but not nodeValue(s). What am I doing wrong? My firebug extension is showing me that my XML returned the information fine.

Here is my XML:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<products>
  <product pr_id="1">
    <name>washing machine</name>

    <details>hoover washing machine, 3yr warranty etc</details>
  </product>
</products>

Nibinaear