In the following example we use the 'staff.xml' file which has one comment as the first child node of the root element. The code displays the nodeName, nodeType and nodeValue properties for this Comment.

XML:
<staff>
   <!-- longest employed staff first -->
   <employee ssn="123456" pay="3">
      <f_name>John</f_name>
      <l_name>Sullivan</l_name>
   </employee>
   <employee ssn="987654" pay="2">
      <f_name>Mary</f_name>
      <l_name>Lopez</l_name>
   </employee>
</staff>

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

elem = xml_doc.documentElement.firstChild;
document.write(elem.nodeName);
document.write("<br>" + elem.nodeType);
document.write("<br>" + elem.nodeValue);

Output:
#comment
8
longest employed staff first

A Comment is also a Node object, and so inherits various properties and methods from it. For details of the values returned by the nodeName, nodeType and nodeValue properties for a Comment, see the Node object.