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<!DOCTYPE html>
<html>
<head>
<script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<meta charset=utf-8 />
<title>Test Page</title>
<!--[if IE]>
  <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<style>
  article, aside, figure, footer, header, hgroup, 
  menu, nav, section { display: block; }
  body {
    font-family: sans-serif;
  }
  p {
    margin: 0px;
  }
</style>
</head>
<body>
  <input type='button' id='theButton' value='Click Me'>
</body>
</html>
 
jQuery(function($) {
  
  $("#theButton").click(function() {
    var xmlDoc;
    
    xmlDoc = $.parseXML(
      "<?xml version='1.0'?>\n" +
      "<things>\n" +
      "    <carpet>\n" +
      "        <id>1</id>\n" +
      "        <name>1</name>\n" +
      "        <desc>1.5</desc>\n" +
      "    </carpet>\n" +
      "    <carpet>\n" +
      "        <id>2</id>\n" +
      "        <name>2</name>\n" +
      "        <height>unknown</height>\n" +
      "    </carpet>\n" +
      "</things>"
    );
    
    display("Before, nodes under first <code>carpet</code>:" +
            $(xmlDoc).find("carpet:first")[0].childNodes.length);
  
    walk(xmlDoc); // Where xmlDoc is your XML document instance
  
    display("After, nodes under first <code>carpet</code>:" +
            $(xmlDoc).find("carpet:first")[0].childNodes.length);
  });
​
  var reBlank = /^\s*$/;
  function walk(node) {
      var child, next;
      switch (node.nodeType) {
          case 3: // Text node
              if (reBlank.test(node.nodeValue)) {
                  node.parentNode.removeChild(node);
              }
              break;
          case 1: // Element node
          case 9: // Document node
              child = node.firstChild;
              while (child) {
                  next = child.nextSibling;
                  walk(child);
                  child = next;
              }
              break;
      }
  }
  
  function display(msg) {
    $("<p>").html(msg).appendTo(document.body);
  }
  
});
Output

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