michael@0: /* -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: function findBody(node)
michael@0: {
michael@0:   if (node.nodeType != Node.ELEMENT_NODE) {
michael@0:     return null;
michael@0:   }
michael@0:   var children = node.childNodes;
michael@0:   if (children == null) {
michael@0:     return null;
michael@0:   }
michael@0:   var length = children.length;
michael@0:   var child = null;
michael@0:   var count = 0;
michael@0:   while (count < length) {
michael@0:     child = children[count];
michael@0:     if (child.tagName == "BODY") {
michael@0:       dump("BODY found");
michael@0:       return child;
michael@0:     }
michael@0:     var body = findBody(child);
michael@0:     if (null != body) {
michael@0:       return body;
michael@0:     }
michael@0:     count++;
michael@0:   }
michael@0:   return null;
michael@0: }
michael@0: 
michael@0: // Given the body element, find the first table element
michael@0: function findTable(body)
michael@0: {
michael@0:   // XXX A better way to do this would be to use getElementsByTagName(), but
michael@0:   // it isn't implemented yet...
michael@0:   var children = body.childNodes
michael@0:   if (children == null) {
michael@0:     return null;
michael@0:   }
michael@0:   var length = children.length;
michael@0:   var child = null;
michael@0:   var count = 0;
michael@0:   while (count < length) {
michael@0:     child = children[count];
michael@0:     if (child.nodeType == Node.ELEMENT_NODE) {
michael@0:       if (child.tagName == "TABLE") {
michael@0:         dump("TABLE found");
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0:     count++;
michael@0:   }
michael@0: 
michael@0:   return child;
michael@0: }
michael@0: 
michael@0: // Change the table's caption
michael@0: function changeCaption(table)
michael@0: {
michael@0:   // Get the first element. This is the caption (maybe). We really should
michael@0:   // check...
michael@0:   var caption = table.firstChild
michael@0: 
michael@0:   // Get the caption text
michael@0:   var text = caption.firstChild
michael@0: 
michael@0:   // Append some text
michael@0:   text.append(" NEW TEXT")
michael@0: }
michael@0: 
michael@0: changeCaption(findTable(findBody(document.documentElement)))
michael@0: