The Tor Browser / file revision

 /* -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 //

 // travers the html tree and dump out the type of element

 //

 function traverse(node, indent)

 {

     dump("\n")

     indent += "  "

     var type = node.nodeType;

     // if it's an element dump the tag and recurse the children

     if (type == Node.ELEMENT_NODE) {

         dump(indent + node.tagName)

         // go through the children

         if (node.hasChildNodes()) {

             var children = node.childNodes;

             var length = children.length;

             var count = 0;

             while(count < length) {

                 child = children[count]

                 traverse(child, indent)

                 count++

             }

         }

     }

     // it's just text, no tag, dump "Text"

     else if (type == Node.TEXT_NODE) {

         dump(indent + "Text")

     }

 }

 var node = document.documentElement

 traverse(node, "")

 dump("\n")