Changing an XML node value?

Hi. I need to change an XML node value after its loaded for a photoviewer.
(I’ve no control over the XML format, so I need to edit it at runtime)

This <picture> has no path


<root>
  <image>
    <picture>10.jpg</picture> 
  </image>
</root>

This comes from the “images” folder

 
<root>
  <image>
    <picture>images/10.jpg</picture> 
  </image>
</root>

Any idea how I can insert the string “images/” at runtime, so when I force the photoviewer to reload, It reads the modified XML, giving me control over where the images come from?

I’m retrieving the node value (10.jpg) via…

[AS]
data_xml.firstChild.childNodes*.childNodes[j].firstChild.nodeValue;
[/AS]

Thanks,
Pablo