Tim Platt wrote:
> Until now I have not had any reason to learn about XML. I have spent
> quite a few hours playing with examples and reading group discussions
> like these - with a certain amount of success. However, I have a
> specific task to accomplish, and so far I have fallen at the last
> hurdle.
> 
> I want to display the following 'feed' from an external server on our
> clients:
> 
> http://www.q3.hpi.co.uk/servlet/HpiGate1_0?forward=YES&efxid=0502863&password=testing&initials=tp&function=SEARCH&vrm=V110ABE&XML=YES&product=HPI11&deviceType=XM

Inside of the browser your script can only connect back to the server 
the HTML document with the script was loaded from.

>   xmlhttp.onreadystatechange=onResponse;
>   xmlhttp.open("GET",url,true);
>   xmlhttp.setRequestHeader("Content-Type","text/xml")
>   xmlhttp.send(null);

The HTTP reqest header Content-Type should be set if you do a POST or 
PUT request and send a request body. As you do a GET request which does 
not have any request body it does not make sense to set the Content-Type 
request header.


>   document.getElementById('A1').innerHTML=xmlhttp.status;
>   document.getElementById('A2').innerHTML=xmlhttp.statustext;
>   document.getElementById('A3').innerHTML=xmlhttp.responsetext;

JavaScript is case sensitive so it should be statusText and responseText.

>   var response = xmlhttp.responseXML.documentElement;

For responseXML to be populated the response the server sends should 
have Content-Type application/xml or text/xml but that server does not 
send that header value so responseXML is not being populated.






-- 

	Martin Honnen --- MVP XML
	http://JavaScript.FAQTs.com/