start talking about polymer.dart

src/site/js/scripts.js

 $(document).ready(function() {
   var addPermalink = function() {
+    if ($(this).hasClass('no-permalink')) {
+      return;
+    }
         $(this).addClass('has-permalink');
         $(this).append($('<a class="permalink" title="Permalink" href="#' + $(this).attr('id') + '">#</a>'));
   };
 
   $.each(['h2','h3','h4'], function(n, h) { $('.has-permalinks ' + h).each(addPermalink); });
 
   // Add the `prettyprint` class to the blocks of code specified in the way that
   // the book pages use.
   $('pre.programlisting > em > span.remark, pre.screen > em > span.remark')
       .each(function(i, element) {
     var $element = $(element);
     var $programListing = $element.parent().parent();
     $programListing.addClass('prettyprint');
     // This regular expression is to test if this remark is of the right form to
     // specify the language of the code block.
     var re = /^lang\-[a-z]+$/i;
     if (re.test($element.text().trim())) {
       $programListing.addClass($element.text().trim());
     }
   });
 
   // Add syntax highlighting.
   prettyPrint();
 });