more link tweaking

src/site/docs/tutorials/custom-elements/index.markdown

 ---
 layout: default
 title: "Define a Custom DOM Tag"
 description: "Define a custom DOM element tag with help from the Web UI package"
 has-permalinks: true
 tutorial:
   id: web-components
-next: fetchdata
+next: fetchdata/
 next-title: "Fetch Data Dynamically"
-prev: templates
+prev: templates/
 prev-title: "Use Templates"
 ---
 
 {% capture whats_the_point %}
 
 * Make your own DOM element tags with the <element> tag.
 * A custom element requires a template and can have a script.
 * Use data binding to connect Dart variables to content.
 * Directly attach event handlers in HTML.
 
@@ skipping 25 matching lines @@
 </div>
 
 <hr>
 
 <aside class="alert" style="background-color:Lavender;color:SlateBlue">
   <font size="24">
   <i class="icon-bullhorn"> </i>
   </font>
 
   The Dart Web UI team recently
-  <a href="https://groups.google.com/a/dartlang.org/forum/#!topic/web-ui/6laXXxRtA7k">announced</a>
+  <a href="https://groups.google.com/a/dartlang.org/forum/#!topic/web-ui/6laXXxRtA7k" target="_blank">announced</a>
   a port of the Polymer project:
-  <a href="http://pub.dartlang.org/packages/polymer">polymer.dart</a>.
+  <a href="https://pub.dartlang.org/packages/polymer" target="_blank">polymer.dart</a>.
 
   We've converted most of the tutorial Web UI examples and compiled some
   <a href="https://github.com/dart-lang/dart-tutorials-samples/blob/master/web/to-polymer-notes.txt" target="_blank">notes</a>
   along the way.
   Check out source code for the polymer version of the
   <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target08-polymer/drseuss"
      target="_blank">drseuss</a>
   example.
 </aside>
 
 <hr>
 
 Custom elements are one kind of web component
 defined in the Web Components model.
 Using templates and scripts,
 a custom element defines a new DOM tag
 that extends an existing tag.
 This target shows you how to define a custom element
 and how to create an instance of that element.
 Dart's implementation of custom elements is in the
-<a href="http://pub.dartlang.org/packages/web_ui"
+<a href="https://pub.dartlang.org/packages/web_ui"
    target="blank">Web UI package</a>,
 which is required to run the examples in this target.
 A previous target,
 <a href="/docs/tutorials/web-ui/">Get Started with Web UI</a>,
 shows you how to install the Web UI package.
 
 * [About custom elements](#about-custom-elements)
 * [Connecting the files](#connecting-the-files)
 * [Instantiating a custom element](#instantiating-a-custom-element)
 * [Defining a custom element](#defining-a-custom-element)
@@ skipping 29 matching lines @@
 You can also create a complex,
 reusable element by bundling elements together inside the custom element.
 Running below is an instance of a custom element, called `x-converter`,
 that extends the &lt;div&gt; tag
 and contains several elements within it.
 Everything within the yellow box is part of the x-converter element.
 Try it! Type a number into one of the fields and press return.
 
 <iframe class="running-app-frame"
         style="height:100px;width:400px;"
-        src="http://dart-lang.github.com/dart-tutorials-samples/web/target08/drseuss/web/out/drseuss.html">
+        src="http://dart-lang.github.io/dart-tutorials-samples/web/target08/drseuss/web/out/drseuss.html">
 </iframe>
 
 You can find the complete source code for this sample on github at
 <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target08/drseuss" target="_blank">drseuss</a>.
 
 This repository includes the pubspec.yaml and build.dart
 files necessary to install the Web UI package and build the app.
 Refer to
 <a href="/docs/tutorials/web-ui/">Get Started with Web UI</a>
 for instructions.
@@ skipping 23 matching lines @@
 ##Connecting the files
 
 The embedded app just below contains
 three x-converter elements,
 each configured with different labels and
 a different ratio.
 Try it! Enter numbers into each of the fields.
 
 <iframe class="running-app-frame"
         style="height:225px;width:400px;"
-        src="http://dart-lang.github.com/dart-tutorials-samples/web/target08/convertthis/web/out/convertThis.html">
+        src="http://dart-lang.github.io/dart-tutorials-samples/web/target08/convertthis/web/out/convertThis.html">
 </iframe>
 
 You can find the complete source code for this sample on github at
 <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target08/convertthis" target="_blank">convertthis</a>.
 
 This app is implemented with these Dart and HTML files:
 
 | File | Description|
 |---|---|
 | <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target08/convertthis/web/converter-element.html" target="_blank">converter-element.html</a> | Defines the UI for the x-converter custom element |
@@ skipping 223 matching lines @@
   The Web UI package contains several examples,
   including a version of
   <a href="https://github.com/dart-lang/web-ui/tree/master/example/todomvc"
      target="_blank">TodoMVC</a>.
 </li>
 </ul>
 
 {% endcapture %}
 
 {% include tutorial.html %}