<html>
<head>
<script src="/demo/loadxmldoc.js"> 
</script>
</head>
<body>
<script>
xmlDoc=loadXMLDoc("books_comment.xml");
x=xmlDoc.getElementsByTagName("book")[0].childNodes;
for (i=0;i<x.length;i++)
{ 
if (x[i].nodeType==8)
  { 
  //Process only comment nodes
  x[i].replaceData(4,6,"Easy");
  document.write(x[i].data);
  document.write("<br>");
  } 
}
</script>
</body>
</html>