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professional-javascript-06-TreeWalkerExample1.htm / htm

          <title>TreeWalker Example</title>
          <script type="text/javascript">
             var walker = null;
             function makeList() {
                 var oDiv = document.getElementById("div1");
                 var oFilter = new Object;
                 oFilter.acceptNode = function (oNode) {
                     return (oNode.tagName == "P") ? 
                             NodeFilter.FILTER_REJECT : NodeFilter.FILTER_ACCEPT;
                 walker = document.createTreeWalker(oDiv, NodeFilter.SHOW_ELEMENT, oFilter, false);
                 var oOutput = document.getElementById("text1");
                 var oNode = walker.nextNode();
                 while (oNode) {
                     oOutput.value += oNode.tagName + "\n";
                     oNode = walker.nextNode();
          <p><strong>Note:</strong> The <code>TreeWalker</code> object has only been implemented in Opera (version 7.6 and higher), Safari (version 1.3 and higher), and Firefox (version 1.0 and higher). It has not been implemented in Internet Explorer (so this example won't work).</p>
          <div id="div1">
              <p>Hello <b>World!</b></p>
                  <li>List item 1</li>
                  <li>List item 2</li>
                  <li>List item 3</li>
          <textarea rows="10" cols="40" id="text1"></textarea><br />
          <input type="button" value="Make List" onclick="makeList()" />

(C) Æliens 20/2/2008

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