Define a NodeFilter function to accept only 'img' elements : DOM Content « Development « JavaScript DHTML






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Define a NodeFilter function to accept only 'img' elements


/*
Examples From
JavaScript: The Definitive Guide, Fourth Edition

Legal matters: these files were created by David Flanagan, and are
Copyright (c) 2001 by David Flanagan.  You may use, study, modify, and
distribute them for any purpose.  Please note that these examples are
provided "as-is" and come with no warranty of any kind.

David Flanagan
*/

// Define a NodeFilter function to accept only <img> elements
function imgfilter(n) {
   if (n.tagName == 'IMG') return NodeFilter.FILTER_ACCEPT;
   else return NodeFilter.FILTER_SKIP;
}

// Create a NodeIterator to find <img> tags
var images = document.createNodeIterator(document, // traverse entire document
  /* only look at Element nodes */ NodeFilter.SHOW_ELEMENT,
    /* filter out all but <img> */ imgfilter,
    /* unused in HTML documents */ false);

// Use the iterator to loop through all images and do something with them
var image;
while((image = images.nextNode()) != null) {
    image.style.visibility = "hidden";  // Process the image here
}








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