The lastChild property is read-only and returns the last child of a given node. If there is no such node, or the node is of a type that cannot have child nodes (see the DOM Structure Model), then it returns null.

The example that follows obtains the text of the last child node of the root element of the 'states.xml' file.

XML:
<States>
   <State ref="FL">
      <name>Florida</name>
      <capital>Tallahassee</capital>
   </State>
   <State ref="IA">
      <name>Iowa</name>
      <capital>Des Moines</capital>
   </State>
</States>

Code (JavaScript):
var xml_doc = new ActiveXObject("Microsoft.XMLDOM");
xml_doc.async = false;
xml_doc.load("states.xml");

var l_child = xml_doc.documentElement.lastChild.text;
document.write(l_child);

Output:
Iowa Des Moines