I have to load an xml from a url and process the request.

Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<body onload="readXmlFile()">
 <h1>ReadXML</h1>
    <p>
       If all goes well you should see an alert box display the message 'testing 123'
   </p>
    <p>Press the 'go' button to read the xml file '<a href="test123">test123</a>' 
       from the web server. 
       <input type="button" onclick="readXmlFile()" value="go"/>
    </p>
</body>


<script type="text/javascript">
XML.load = function(url) {
alert("1");
alert(url);
    var xmldoc = XML.newDocument();
    xmldoc.async = false;  
    xmldoc.load(url);
    return xmldoc;  
  };


XML.newDocument = function(rootTagName, namespaceURL) {
    if (!rootTagName) rootTagName = "";
    if (!namespaceURL) namespaceURL = "";

    if (document.implementation && document.implementation.createDocument) {
        // This is the W3C standard way to do it
        return document.implementation.createDocument(namespaceURL, 
                       rootTagName, null);
    }
    else { // This is the IE way to do it
        // Create an empty document as an ActiveX object
        // If there is no root element, this is all we have to do
        var doc = new ActiveXObject("MSXML2.DOMDocument");

        // If there is a root tag, initialize the document
        if (rootTagName) {
            // Look for a namespace prefix
            var prefix = "";
            var tagname = rootTagName;
            var p = rootTagName.indexOf(':');
            if (p != -1) {
                prefix = rootTagName.substring(0, p);
                tagname = rootTagName.substring(p+1);
            }

            // If we have a namespace, we must have a namespace prefix
            // If we don't have a namespace, we discard any prefix
            if (namespaceURL) {
                if (!prefix) prefix = "a0"; // What Firefox uses
            }
            else prefix = "";

            // Create the root element (with optional namespace) as a
            // string of text
            var text = "<" + (prefix?(prefix+":"):"") + tagname +
                (namespaceURL
                 ?(" xmlns:" + prefix + '="' + namespaceURL +'"')
                 :"") +
                "/>";
            // And parse that text into the empty document
            doc.loadXML(text);
        }
        return doc;
    }
}; 

function readXmlFile() {
  url = 'http://open.api.ebay.com/shopping?callname=FindItems&responseencoding=XML&appid=AneeshVK-1af9-4429-99ab-99fa586437ca&siteid=3&version=515&SellerID=timbarson1';
alert(url);
  doc = XML.load(url);
  alert(doc);
  alert(doc.documentElement.firstChild.nextSibling.firstChild.nodeValue);
}
</script>
</html>
but i am getting error while the url is called for loading.

the error is

Code:
Error: uncaught exception: [Exception... "Access to restricted URI denied"  code: "1012" nsresult: "0x805303f4 (NS_ERROR_DOM_BAD_URI)"  location: "http://localhost/bulbtemplate/abcd.html Line: 26"]
i am running it from xampp. i am badly stuck here and would like to have any advice/help in this. I have to load this xml and process it to take the details to display in the page

Thanks
Aneesh.V.K