Simple AJAX with xml

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Join Date: Jul 2006

Posts: 11

Reputation: AndrewSmith is an unknown quantity at this point

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AndrewSmith AndrewSmith is offline

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Simple AJAX with xml

Aug 25th, 2006

hey. I'm trying to get a grasp on XML for use with AJAX.
here is my code. what i want to do is grab the stuff between the 'content' tags, and display it. then i want to take the stuff between the 'script' tags, and eval it (so it will execute).

here is my simple xml document:

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<?xml version="1.0" encoding="ISO-8859-1"?>
<document>
<myScript> alert("hello world"); </myScript>
<content> This text should be displayed as content. </content>
</document>

and my handleResponse code from the calling page:

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function handleResponse(http_request, divID){
   var myDiv = document.getElementById(divID);
   if (http_request.readyState == 4) {
      if (http_request.status == 200) {
          myXMLDoc = http_request.responseXML;
          content = myXMLDoc.getElementsByTagName("content");
          myDiv.innerHTML = content; 
   } else {
   alert("There was a problem with the request.");
  }
 }
}

When i run this, i get the error "object doesn't support this property or method" ... and its complaining about the line :
content = myXMLDoc.getElementsByTagName("content");

Can anybody see what I'm doing wrong, and possibly suggest how to fix it? I'm just getting into XML, and it would be a big help
Thanks!

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Join Date: Aug 2005

Location: Carmel, IN

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Sailor_Jerry Sailor_Jerry is offline

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Re: Simple AJAX with xml

Aug 27th, 2006

Your getting that error because that property does not exist on the XML document.

You must first parse the document before you can access the DOM. Once you do this your code should work.

Here is some info on parsing an XML document: http://www.w3schools.com/dom/dom_parser.asp