From a8d95d4721e714a7e1d683e14e997faa5ccddaff Mon Sep 17 00:00:00 2001
From: adamjacobbecker <ad@mbecker.cc>
Date: Tue, 6 Aug 2013 21:25:36 -0700
Subject: [PATCH] Improve accessibility (Section 508, WCAG)

This PR significantly improves Bootstrap's accessibility for users of assistive technology, such as screen readers. Some of the these changes add additional markup to the source examples, but we believe that the sacrifice in readability is worth achieving more widespread usage of accessibility best-practices.

What was done
- Added lots of [WAI-ARIA attributes](http://www.w3.org/WAI/intro/aria)
- Added `.sr-only` helper class, that is only readable by screen readers (and invisible for all other users). This lets us - make progress bars and paginations accessible to screen reading users.
- Advised users to always use label elements. For inline forms, they can hide them with `.sr-only`
- Added 'Skip navigation' link
- Added "Accessibility" section to getting-started.html.

What *wasn't* done
- Contrast issues (twbs#3572)
- Tooltips (twbs#8469)
- Documentation re: usage of icons, since they now live in a separate repo

Major props to all that contributed: @bensheldon, @jasonlally, @criscristina, and @louh. Feel free to chime in, guys, if I've left anything out.
---
 _includes/nav-getting-started.html |   3 +
 _includes/nav-main.html            |   3 +-
 _includes/social-buttons.html      |   4 +-
 _layouts/customize.html            |   5 +-
 _layouts/default.html              |   9 ++-
 _layouts/home.html                 |   3 +-
 components.html                    | 126 +++++++++++++++++------------
 css.html                           |  22 ++++-
 dist/css/bootstrap.css             |  11 +++
 dist/css/bootstrap.min.css         |   2 +-
 getting-started.html               |  33 ++++++++
 index.html                         |   2 +-
 javascript.html                    |  22 ++++-
 less/scaffolding.less              |  14 ++++
 14 files changed, 189 insertions(+), 70 deletions(-)

diff --git a/_includes/nav-getting-started.html b/_includes/nav-getting-started.html
index 9788facdda..ad574b6211 100644
--- a/_includes/nav-getting-started.html
+++ b/_includes/nav-getting-started.html
@@ -17,6 +17,9 @@
 <li>
   <a href="#third-parties">Third party support</a>
 </li>
+<li>
+  <a href="#accessibility">Accessibility</a>
+</li>
 <li>
   <a href="#license-faqs">License FAQs</a>
 </li>
diff --git a/_includes/nav-main.html b/_includes/nav-main.html
index a9604f5884..6b5742cd1f 100644
--- a/_includes/nav-main.html
+++ b/_includes/nav-main.html
@@ -1,6 +1,7 @@
-<div class="navbar navbar-inverse navbar-fixed-top bs-docs-nav">
+<div class="navbar navbar-inverse navbar-fixed-top bs-docs-nav" role="navigation">
   <div class="container">
     <button class="navbar-toggle" type="button" data-toggle="collapse" data-target=".bs-navbar-collapse">
+      <span class="sr-only">Toggle navigation</span>
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
diff --git a/_includes/social-buttons.html b/_includes/social-buttons.html
index 3700ecd14a..b52cac2f6b 100644
--- a/_includes/social-buttons.html
+++ b/_includes/social-buttons.html
@@ -1,10 +1,10 @@
 <div class="bs-social">
   <ul class="bs-social-buttons">
     <li>
-      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=twbs&repo=bootstrap&type=watch&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="100px" height="20px"></iframe>
+      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=twbs&repo=bootstrap&type=watch&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="100px" height="20px" title="Star on GitHub"></iframe>
     </li>
     <li>
-      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=twbs&repo=bootstrap&type=fork&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="102px" height="20px"></iframe>
+      <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=twbs&repo=bootstrap&type=fork&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="102px" height="20px" title="Fork on GitHub"></iframe>
     </li>
     <li class="follow-btn">
       <a href="https://twitter.com/twbootstrap" class="twitter-follow-button" data-link-color="#0069D6" data-show-count="true">Follow @twbootstrap</a>
diff --git a/_layouts/customize.html b/_layouts/customize.html
index 28275c3e16..99b973c01f 100644
--- a/_layouts/customize.html
+++ b/_layouts/customize.html
@@ -6,12 +6,13 @@
     <!-- Place anything custom after this. -->
   </head>
   <body data-spy="scroll" data-target=".bs-sidebar">
+    <a class="sr-only" href="#content">Skip navigation</a>
 
     <!-- Docs master nav -->
     {% include nav-main.html %}
 
     <!-- Docs page layout -->
-    <div class="bs-header">
+    <div class="bs-header" id="content" role="banner">
       <div class="container">
         <h1>{{ page.title }}</h1>
         <p>{{ page.lead }}</p>
@@ -22,7 +23,7 @@
     <!-- Callout for the old docs link -->
     {% include old-bs-docs.html %}
 
-    <div class="bs-customize-placeholder">
+    <div class="bs-customize-placeholder" role="main">
       <div class="container bs-docs-container">
         <p class="lead">Until RC2, the Bootstrap 3 customizer will be disabled. In the mean time, snag the <a href="{{ site.repo }}/releases">compiled CSS and JavaScript</a>. Hang tight!</p>
       </div>
diff --git a/_layouts/default.html b/_layouts/default.html
index 67b81b9e87..17431f91ee 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -6,12 +6,13 @@
     <!-- Place anything custom after this. -->
   </head>
   <body>
+    <a class="sr-only" href="#content">Skip navigation</a>
 
     <!-- Docs master nav -->
     {% include nav-main.html %}
 
     <!-- Docs page layout -->
-    <div class="bs-header">
+    <div class="bs-header" id="content" role="banner">
       <div class="container">
         <h1>{{ page.title }}</h1>
         <p>{{ page.lead }}</p>
@@ -25,7 +26,7 @@
     <div class="container bs-docs-container">
       <div class="row">
         <div class="col-lg-3">
-          <div class="bs-sidebar">
+          <div class="bs-sidebar" role="complementary">
             <ul class="nav bs-sidenav">
               {% if page.slug == "getting-started" %}
                 {% include nav-getting-started.html %}
@@ -41,7 +42,7 @@
             </ul>
           </div>
         </div>
-        <div class="col-lg-9">
+        <div class="col-lg-9" role="main">
           {{ content }}
         </div>
       </div>
@@ -50,7 +51,7 @@
 
     <!-- Footer
     ================================================== -->
-    <footer class="bs-footer">
+    <footer class="bs-footer" role="contentinfo">
       {% include social-buttons.html %}
 
       <p>Designed and built with all the love in the world by <a href="http://twitter.com/mdo" target="_blank">@mdo</a> and <a href="http://twitter.com/fat" target="_blank">@fat</a>.</p>
diff --git a/_layouts/home.html b/_layouts/home.html
index 5885337668..6beee6c542 100644
--- a/_layouts/home.html
+++ b/_layouts/home.html
@@ -6,6 +6,7 @@
     <!-- Place anything custom after this. -->
   </head>
   <body class="bs-docs-home">
+    <a class="sr-only" href="#content">Skip navigation</a>
 
     <!-- Docs master nav -->
     {% include nav-main.html %}
@@ -16,7 +17,7 @@
     <!-- Callout for the old docs link -->
     {% include old-bs-docs.html %}
 
-    <div class="container">
+    <div class="container" role="contentinfo">
       {% include social-buttons.html %}
 
       <ul class="bs-masthead-links">
diff --git a/components.html b/components.html
index b393852412..b094316255 100644
--- a/components.html
+++ b/components.html
@@ -1020,7 +1020,7 @@ base_url: "../"
     <h2 id="navbar-basic">Basic navbar</h2>
     <p>To start, navbars are static (not fixed to the top) and include support for a project name and basic navigation. Place one anywhere within a <code>.container</code>, which sets the width of your site and content.</p>
     <div class="bs-example">
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <a class="navbar-brand" href="#">Title</a>
         <ul class="nav navbar-nav">
           <li class="active"><a href="#">Home</a></li>
@@ -1030,7 +1030,7 @@ base_url: "../"
       </div>
     </div><!-- /example -->
 {% highlight html %}
-<div class="navbar">
+<div class="navbar" role="navigation">
   <a class="navbar-brand" href="#">Title</a>
   <ul class="nav navbar-nav">
     <li class="active"><a href="#">Home</a></li>
@@ -1039,13 +1039,17 @@ base_url: "../"
   </ul>
 </div>
 {% endhighlight %}
+<div class="bs-callout bs-callout-warning">
+  <h4>Make navbars accessible</h4>
+  <p>Be sure to add a <code>role="navigation"</code> to every navbar to help with accessibility.</p>
+</div>
 
     <h2>Navbar components</h2>
 
     <h3 id="navbar-brand">Brand</h3>
     <p>A simple link to show your brand or project name only requires an anchor tag.</p>
     <div class="bs-example">
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <a class="navbar-brand" href="#">Title</a>
       </div>
     </div><!-- /example -->
@@ -1056,7 +1060,7 @@ base_url: "../"
     <h3 id="navbar-nav">Nav links</h3>
     <p>Nav items are simple to add via unordered lists.</p>
     <div class="bs-example">
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <ul class="nav navbar-nav">
           <li class="active"><a href="#">Home</a></li>
           <li><a href="#">Link</a></li>
@@ -1076,14 +1080,14 @@ base_url: "../"
     <p>To properly style and position a form within the navbar, add the appropriate classes as shown below. For a default form, include <code>.navbar-form</code> and either <code>.pull-left</code> or <code>.pull-right</code> to properly align it.</p>
     <div class="bs-example">
 
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <form class="navbar-form pull-left">
           <input type="text" class="form-control" style="width: 200px;">
           <button type="submit" class="btn btn-default">Submit</button>
         </form>
       </div>
 
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <form class="navbar-form pull-left">
           <select name="" id="" class="form-control" style="width: 200px;">
             <option value="1">1</option>
@@ -1095,7 +1099,7 @@ base_url: "../"
         </form>
       </div>
 
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <form class="navbar-form pull-left">
           <input type="text" class="form-control" style="width: 200px;">
           <input type="checkbox">
@@ -1103,7 +1107,7 @@ base_url: "../"
         </form>
       </div>
 
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <form class="navbar-form pull-left">
           <input type="text" class="form-control" style="width: 200px;">
           <label class="checkbox-inline">
@@ -1124,7 +1128,7 @@ base_url: "../"
     <h3 id="navbar-buttons">Buttons</h3>
     <p>For buttons not residing in a <code>&lt;form&gt;</code>, add this class to vertically center buttons within a navbar.</p>
     <div class="bs-example">
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <a href="#" class="navbar-brand">Brand</a>
         <button type="button" class="btn btn-default navbar-btn">Sign in</button>
       </div>
@@ -1136,13 +1140,13 @@ base_url: "../"
     <h3 id="navbar-text">Text</h3>
     <p>Wrap strings of text in an element with <code>.navbar-text</code>, usually on a <code>&lt;p&gt;</code> tag for proper leading and color.</p>
     <div class="bs-example">
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <a href="#" class="navbar-brand">Brand</a>
         <p class="navbar-text">Signed in as Mark Otto</p>
       </div>
     </div>
 {% highlight html %}
-<div class="navbar">
+<div class="navbar" role="navigation">
   <a href="#" class="navbar-brand">Brand</a>
   <p class="navbar-text">Signed in as Mark Otto</p>
 </div>
@@ -1151,13 +1155,13 @@ base_url: "../"
     <h3 id="navbar-links">Links</h3>
     <p>For folks using standard links that are not within the regular navbar navigation component, use the <code>.navbar-link</code> class to add the proper colors for the default and inverse navbar options.</p>
     <div class="bs-example">
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <a href="#" class="navbar-brand">Brand</a>
         <p class="navbar-text pull-right">Signed in as <a href="#" class="navbar-link">Mark Otto</a></p>
       </div>
     </div>
 {% highlight html %}
-<div class="navbar">
+<div class="navbar" role="navigation">
   <a href="#" class="navbar-brand">Brand</a>
   <p class="navbar-text pull-right">Signed in as <a href="#" class="navbar-link">Mark Otto</a></p>
 </div>
@@ -1185,7 +1189,7 @@ base_url: "../"
       </div>
     </div><!-- /example -->
 {% highlight html %}
-<div class="navbar navbar-fixed-top">
+<div class="navbar navbar-fixed-top" role="navigation">
   ...
 </div>
 {% endhighlight %}
@@ -1202,7 +1206,7 @@ body { padding-top: 70px; }
     <h3 id="navbar-fixed-bottom">Fixed to bottom</h3>
     <p>Add <code>.navbar-fixed-bottom</code> instead.</p>
     <div class="bs-example bs-navbar-bottom-example">
-      <div class="navbar navbar-fixed-bottom">
+      <div class="navbar navbar-fixed-bottom" role="navigation">
         <div class="container" style="width: auto;">
           <a class="navbar-brand" href="#">Title</a>
           <ul class="nav navbar-nav">
@@ -1214,7 +1218,7 @@ body { padding-top: 70px; }
       </div>
     </div><!-- /example -->
 {% highlight html %}
-<div class="navbar navbar-fixed-bottom">
+<div class="navbar navbar-fixed-bottom" role="navigation">
   ...
 </div>
 {% endhighlight %}
@@ -1231,7 +1235,7 @@ body { padding-bottom: 70px; }
     <h3 id="navbar-static-top">Static top navbar</h3>
     <p>Create a full-width navbar that scrolls away with the page by adding <code>.navbar-static-top</code>. Unlike the <code>.navbar-fixed-*</code> classes, you do not need to change any padding on the <code>body</code>.</p>
     <div class="bs-example bs-navbar-top-example">
-      <div class="navbar navbar-static-top" style="margin: -1px -1px 0;">
+      <div class="navbar navbar-static-top" role="navigation" style="margin: -1px -1px 0;">
         <div class="container" style="width: auto;">
           <a class="navbar-brand" href="#">Title</a>
           <ul class="nav navbar-nav">
@@ -1243,7 +1247,7 @@ body { padding-bottom: 70px; }
       </div>
     </div><!-- /example -->
 {% highlight html %}
-<div class="navbar navbar-static-top">
+<div class="navbar navbar-static-top" role="navigation">
   ...
 </div>
 {% endhighlight %}
@@ -1252,9 +1256,10 @@ body { padding-bottom: 70px; }
     <h2 id="navbar-responsive">Responsive navbar</h2>
     <p>To implement a collapsing responsive navbar, wrap your navbar content in a containing div, <code>.nav-collapse.collapse</code>, and add the navbar toggle button, <code>.navbar-toggle</code>.</p>
     <div class="bs-example">
-      <div class="navbar">
+      <div class="navbar" role="navigation">
         <div class="container">
           <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-responsive-collapse">
+            <span class="sr-only">Toggle navigation</span>
             <span class="icon-bar"></span>
             <span class="icon-bar"></span>
             <span class="icon-bar"></span>
@@ -1299,11 +1304,12 @@ body { padding-bottom: 70px; }
       </div><!-- /.navbar -->
     </div><!-- /example -->
 {% highlight html %}
-<div class="navbar">
+<div class="navbar" role="navigation">
   <div class="container">
 
     <!-- .navbar-toggle is used as the toggle for collapsed navbar content -->
     <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-responsive-collapse">
+      <span class="sr-only">Toggle navigation</span>
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
@@ -1371,7 +1377,7 @@ body { padding-bottom: 70px; }
     <h2 id="navbar-inverted">Inverted variation</h2>
     <p>Modify the look of the navbar by adding <code>.navbar-inverse</code>.</p>
     <div class="bs-example">
-      <div class="navbar navbar-inverse">
+      <div class="navbar navbar-inverse" role="navigation">
         <div class="container">
           <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-inverse-collapse">
             <span class="icon-bar"></span>
@@ -1418,7 +1424,7 @@ body { padding-bottom: 70px; }
       </div><!-- /.navbar -->
     </div><!-- /example -->
 {% highlight html %}
-<div class="navbar navbar-inverse">
+<div class="navbar navbar-inverse" role="navigation">
   ...
 </div>
 {% endhighlight %}
@@ -1498,7 +1504,7 @@ body { padding-bottom: 70px; }
     <div class="bs-example">
       <ul class="pagination">
         <li class="disabled"><a href="#">&laquo;</a></li>
-        <li class="active"><a href="#">1</a></li>
+        <li class="active"><a href="#">1 <span class="sr-only">(current)</span></a></li>
         <li><a href="#">2</a></li>
         <li><a href="#">3</a></li>
         <li><a href="#">4</a></li>
@@ -1509,7 +1515,7 @@ body { padding-bottom: 70px; }
 {% highlight html %}
 <ul class="pagination">
   <li class="disabled"><a href="#">&laquo;</a></li>
-  <li class="active"><a href="#">1</a></li>
+  <li class="active"><a href="#">1 <span class="sr-only">(current)</span></a></li>
   ...
 </ul>
 {% endhighlight %}
@@ -1517,7 +1523,7 @@ body { padding-bottom: 70px; }
 {% highlight html %}
 <ul class="pagination">
   <li class="disabled"><span>&laquo;</span></li>
-  <li class="active"><span>1</span></li>
+  <li class="active"><span>1 <span class="sr-only">(current)</span></span></li>
   ...
 </ul>
 {% endhighlight %}
@@ -1964,12 +1970,12 @@ body { padding-bottom: 70px; }
     <p>Default progress bar with a vertical gradient.</p>
     <div class="bs-example">
       <div class="progress">
-        <div class="progress-bar" style="width: 60%;"></div>
+        <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;"><span class="sr-only">60% Complete</span></div>
       </div>
     </div>
 {% highlight html %}
 <div class="progress">
-  <div class="progress-bar" style="width: 60%;"></div>
+  <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;"><span class="sr-only">60% Complete</span></div>
 </div>
 {% endhighlight %}
 
@@ -1977,30 +1983,38 @@ body { padding-bottom: 70px; }
     <p>Progress bars use some of the same button and alert classes for consistent styles.</p>
     <div class="bs-example">
       <div class="progress" style="margin-bottom: 9px;">
-        <div class="progress-bar progress-bar-info" style="width: 20%"></div>
+        <div class="progress-bar progress-bar-info" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%"><span class="sr-only">20% Complete</span></div>
       </div>
       <div class="progress" style="margin-bottom: 9px;">
-        <div class="progress-bar progress-bar-success" style="width: 40%"></div>
+        <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 40%"><span class="sr-only">40% Complete (success)</span></div>
       </div>
       <div class="progress" style="margin-bottom: 9px;">
-        <div class="progress-bar progress-bar-warning" style="width: 60%"></div>
+        <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%"><span class="sr-only">60% Complete (warning)</span></div>
       </div>
       <div class="progress">
-        <div class="progress-bar progress-bar-danger" style="width: 80%"></div>
+        <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%"><span class="sr-only">80% Complete (danger)</span></div>
       </div>
     </div>
 {% highlight html %}
 <div class="progress">
-  <div class="progress-bar progress-bar-info" style="width: 20%"></div>
+  <div class="progress-bar progress-bar-info" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%">
+    <span class="sr-only">20% Complete</span>
+  </div>
 </div>
 <div class="progress">
-  <div class="progress-bar progress-bar-success" style="width: 40%"></div>
+  <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 40%">
+    <span class="sr-only">40% Complete (success)</span>
+  </div>
 </div>
 <div class="progress">
-  <div class="progress-bar progress-bar-warning" style="width: 60%"></div>
+  <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%">
+    <span class="sr-only">60% Complete (warning)</span>
+  </div>
 </div>
 <div class="progress">
-  <div class="progress-bar progress-bar-danger" style="width: 80%"></div>
+  <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%">
+    <span class="sr-only">80% Complete</span>
+  </div>
 </div>
 {% endhighlight %}
 
@@ -2008,30 +2022,38 @@ body { padding-bottom: 70px; }
     <p>Uses a gradient to create a striped effect. Not available in IE8.</p>
     <div class="bs-example">
       <div class="progress progress-striped" style="margin-bottom: 9px;">
-        <div class="progress-bar progress-bar-info" style="width: 20%"></div>
+        <div class="progress-bar progress-bar-info" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%"><span class="sr-only">20% Complete</span></div>
       </div>
       <div class="progress progress-striped" style="margin-bottom: 9px;">
-        <div class="progress-bar progress-bar-success" style="width: 40%"></div>
+        <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 40%"><span class="sr-only">40% Complete (success)</span></div>
       </div>
       <div class="progress progress-striped" style="margin-bottom: 9px;">
-        <div class="progress-bar progress-bar-warning" style="width: 60%"></div>
+        <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%"><span class="sr-only">60% Complete (warning)</span></div>
       </div>
       <div class="progress progress-striped">
-        <div class="progress-bar progress-bar-danger" style="width: 80%"></div>
+        <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%"><span class="sr-only">80% Complete (danger)</span></div>
       </div>
     </div>
 {% highlight html %}
 <div class="progress progress-striped">
-  <div class="progress-bar progress-bar-info" style="width: 20%"></div>
+  <div class="progress-bar progress-bar-info" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%">
+    <span class="sr-only">20% Complete</span>
+  </div>
 </div>
 <div class="progress progress-striped">
-  <div class="progress-bar progress-bar-success" style="width: 40%"></div>
+  <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 40%">
+    <span class="sr-only">40% Complete (success)</span>
+  </div>
 </div>
 <div class="progress progress-striped">
-  <div class="progress-bar progress-bar-warning" style="width: 60%"></div>
+  <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%">
+    <span class="sr-only">60% Complete (warning)</span>
+  </div>
 </div>
 <div class="progress progress-striped">
-  <div class="progress-bar progress-bar-danger" style="width: 80%"></div>
+  <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%">
+    <span class="sr-only">80% Complete (danger)</span>
+  </div>
 </div>
 {% endhighlight %}
 
@@ -2039,12 +2061,14 @@ body { padding-bottom: 70px; }
     <p>Add <code>.active</code> to <code>.progress-striped</code> to animate the stripes right to left. Not available in all versions of IE.</p>
     <div class="bs-example">
       <div class="progress progress-striped active">
-        <div class="progress-bar" style="width: 45%"></div>
+        <div class="progress-bar" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 45%"><span class="sr-only">45% Complete</span></div>
       </div>
     </div>
 {% highlight html %}
 <div class="progress progress-striped active">
-  <div class="progress-bar" style="width: 45%"></div>
+  <div class="progress-bar"  role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 45%">
+    <span class='sr-only'>45% Complete</span>
+  </div>
 </div>
 {% endhighlight %}
 
@@ -2052,16 +2076,16 @@ body { padding-bottom: 70px; }
     <p>Place multiple bars into the same <code>.progress</code> to stack them.</p>
     <div class="bs-example">
       <div class="progress">
-        <div class="progress-bar progress-bar-success" style="width: 35%"></div>
-        <div class="progress-bar progress-bar-warning" style="width: 20%"></div>
-        <div class="progress-bar progress-bar-danger" style="width: 10%"></div>
+        <div class="progress-bar progress-bar-success" style="width: 35%"><span class="sr-only">35% Complete (success)</span></div>
+        <div class="progress-bar progress-bar-warning" style="width: 20%"><span class="sr-only">20% Complete (warning)</span></div>
+        <div class="progress-bar progress-bar-danger" style="width: 10%"><span class='sr-only'>10% Complete (danger)</span></div>
       </div>
     </div>
 {% highlight html %}
 <div class="progress">
-  <div class="progress-bar progress-bar-success" style="width: 35%"></div>
-  <div class="progress-bar progress-bar-warning" style="width: 20%"></div>
-  <div class="progress-bar progress-bar-danger" style="width: 10%"></div>
+  <div class="progress-bar progress-bar-success" style="width: 35%"><span class="sr-only">35% Complete (success)</span></div>
+  <div class="progress-bar progress-bar-warning" style="width: 20%"><span class="sr-only">20% Complete (warning)</span></div>
+  <div class="progress-bar progress-bar-danger" style="width: 10%"><span class="sr-only">10% Complete (danger)</span></div>
 </div>
 {% endhighlight %}
   </div>
diff --git a/css.html b/css.html
index 26b8f1d3f4..17e1deae6e 100644
--- a/css.html
+++ b/css.html
@@ -1300,9 +1300,15 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
       <h4>Requires custom widths</h4>
       <p>Inputs, selects, and textareas are 100% wide by default in Bootstrap. To use the inline form, you'll have to set a width on the form controls used within.</p>
     </div>
+    <div class="bs-callout bs-callout-danger">
+      <h4>Always add labels</h4>
+      <p>Screen readers will have trouble with your forms if you don't include a label for every input. For these inline forms, you can hide the labels using the <code>.sr-only</code> class.</p>
+    </div>
     <form class="bs-example form-inline">
-      <input type="text" class="form-control" placeholder="Email">
-      <input type="password" class="form-control" placeholder="Password">
+      <label class="sr-only" for="exampleInputEmail">Email address</label>
+      <input type="text" class="form-control" id="exampleInputEmail" placeholder="Enter email">
+      <label class="sr-only" for="exampleInputPassword">Password</label>
+      <input type="password" class="form-control" id="exampleInputPassword" placeholder="Password">
       <div class="checkbox">
         <label>
           <input type="checkbox"> Remember me
@@ -1312,8 +1318,10 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
     </form><!-- /example -->
 {% highlight html %}
 <form class="form-inline">
-  <input type="text" class="form-control" placeholder="Email">
-  <input type="password" class="form-control" placeholder="Password">
+  <label class="sr-only" for="exampleInputEmail">Email address</label>
+  <input type="text" class="form-control" id="exampleInputEmail" placeholder="Enter email">
+  <label class="sr-only" for="exampleInputPassword">Password</label>
+  <input type="password" class="form-control" id="exampleInputPassword" placeholder="Password">
   <div class="checkbox">
     <label>
       <input type="checkbox"> Remember me
@@ -1985,6 +1993,12 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
 .element {
   .clearfix();
 }
+{% endhighlight %}
+
+    <h3>.sr-only</h3>
+    <p>Hide an element to all users <em>except</em> screen readers. Necessary for following <a href="{{ page.base_url }}getting-started#accessibility">accessibility best practices</a>.</p>
+{% highlight html %}
+<a class="sr-only" href="#content">Skip to content</a>
 {% endhighlight %}
   </div>
 
diff --git a/dist/css/bootstrap.css b/dist/css/bootstrap.css
index 98acfc8dc7..b505bcfb38 100644
--- a/dist/css/bootstrap.css
+++ b/dist/css/bootstrap.css
@@ -356,6 +356,17 @@ hr {
   border-top: 1px solid #eeeeee;
 }
 
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0 0 0 0);
+  border: 0;
+}
+
 p {
   margin: 0 0 10px;
 }
diff --git a/dist/css/bootstrap.min.css b/dist/css/bootstrap.min.css
index 5baac8d34d..360b3ba18b 100644
--- a/dist/css/bootstrap.min.css
+++ b/dist/css/bootstrap.min.css
@@ -6,4 +6,4 @@
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Designed and built with all the love in the world by @mdo and @fat.
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left}.carousel-inner>.item>img,.carousel-inner>.item>a>img{display:inline-block;height:auto;max-width:100%;line-height:1}.carousel-inner>.active,.carousel-inner>.next,.carousel-inner>.prev{display:block}.carousel-inner>.active{left:0}.carousel-inner>.next,.carousel-inner>.prev{position:absolute;top:0;width:100%}.carousel-inner>.next{left:100%}.carousel-inner>.prev{left:-100%}.carousel-inner>.next.left,.carousel-inner>.prev.right{left:0}.carousel-inner>.active.left{left:-100%}.carousel-inner>.active.right{left:100%}.carousel-control{position:absolute;top:0;bottom:0;left:0;width:15%;font-size:20px;color:#fff;text-align:center;text-shadow:0 1px 2px rgba(0,0,0,0.6);opacity:.5;filter:alpha(opacity=50)}.carousel-control.left{background-image:-webkit-gradient(linear,0 top,100% top,from(rgba(0,0,0,0.5)),to(rgba(0,0,0,0.0001)));background-image:-webkit-linear-gradient(left,color-stop(rgba(0,0,0,0.5) 0),color-stop(rgba(0,0,0,0.0001) 100%));background-image:-moz-linear-gradient(left,rgba(0,0,0,0.5) 0,rgba(0,0,0,0.0001) 100%);background-image:linear-gradient(to right,rgba(0,0,0,0.5) 0,rgba(0,0,0,0.0001) 100%);background-repeat:repeat-x;filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#80000000',endColorstr='#00000000',GradientType=1)}.carousel-control.right{right:0;left:auto;background-image:-webkit-gradient(linear,0 top,100% top,from(rgba(0,0,0,0.0001)),to(rgba(0,0,0,0.5)));background-image:-webkit-linear-gradient(left,color-stop(rgba(0,0,0,0.0001) 0),color-stop(rgba(0,0,0,0.5) 100%));background-image:-moz-linear-gradient(left,rgba(0,0,0,0.0001) 0,rgba(0,0,0,0.5) 100%);background-image:linear-gradient(to right,rgba(0,0,0,0.0001) 0,rgba(0,0,0,0.5) 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.active{width:12px;height:12px;margin:0;background-color:#fff}.carousel-caption{position:absolute;right:15%;bottom:20px;left:15%;z-index:10;padding-top:20px;padding-bottom:20px;color:#fff;text-align:center;text-shadow:0 1px 2px rgba(0,0,0,0.6)}.carousel-caption .btn{text-shadow:none}@media screen and (min-width:768px){.carousel-control .glyphicon,.carousel-control .icon-prev,.carousel-control .icon-next{width:30px;height:30px;margin-top:-15px;margin-left:-15px;font-size:30px}.carousel-caption{right:20%;left:20%;padding-bottom:30px}.carousel-indicators{bottom:20px}}.jumbotron{padding:30px;margin-bottom:30px;font-size:21px;font-weight:200;line-height:2.1428571435;color:inherit;background-color:#eee}.jumbotron h1{line-height:1;color:inherit}.jumbotron p{line-height:1.4}@media screen and (min-width:768px){.jumbotron{padding:50px 60px;border-radius:6px}.jumbotron h1{font-size:63px}}.clearfix:before,.clearfix:after{display:table;content:" "}.clearfix:after{clear:both}.pull-right{float:right!important}.pull-left{float:left!important}.hide{display:none!important}.show{display:block!important}.invisible{visibility:hidden}.text-hide{font:0/0 a;color:transparent;text-shadow:none;background-color:transparent;border:0}.affix{position:fixed}@-ms-viewport{width:device-width}@media screen and 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(max-width:991px){.visible-sm{display:none!important}tr.visible-sm{display:none!important}th.visible-sm,td.visible-sm{display:none!important}.visible-md{display:block!important}tr.visible-md{display:table-row!important}th.visible-md,td.visible-md{display:table-cell!important}.visible-lg{display:none!important}tr.visible-lg{display:none!important}th.visible-lg,td.visible-lg{display:none!important}.hidden-sm{display:block!important}tr.hidden-sm{display:table-row!important}th.hidden-sm,td.hidden-sm{display:table-cell!important}.hidden-md{display:none!important}tr.hidden-md{display:none!important}th.hidden-md,td.hidden-md{display:none!important}.hidden-lg{display:block!important}tr.hidden-lg{display:table-row!important}th.hidden-lg,td.hidden-lg{display:table-cell!important}}@media(min-width:992px){.visible-sm{display:none!important}tr.visible-sm{display:none!important}th.visible-sm,td.visible-sm{display:none!important}.visible-md{display:none!important}tr.visible-md{display:none!important}th.visible-md,td.visible-md{display:none!important}.visible-lg{display:block!important}tr.visible-lg{display:table-row!important}th.visible-lg,td.visible-lg{display:table-cell!important}.hidden-sm{display:block!important}tr.hidden-sm{display:table-row!important}th.hidden-sm,td.hidden-sm{display:table-cell!important}.hidden-md{display:block!important}tr.hidden-md{display:table-row!important}th.hidden-md,td.hidden-md{display:table-cell!important}.hidden-lg{display:none!important}tr.hidden-lg{display:none!important}th.hidden-lg,td.hidden-lg{display:none!important}}.visible-print{display:none!important}tr.visible-print{display:none!important}th.visible-print,td.visible-print{display:none!important}@media print{.visible-print{display:block!important}tr.visible-print{display:table-row!important}th.visible-print,td.visible-print{display:table-cell!important}.hidden-print{display:none!important}tr.hidden-print{display:none!important}th.hidden-print,td.hidden-print{display:none!important}}
\ No newline at end of file
diff --git a/getting-started.html b/getting-started.html
index 38b6f4ed4a..fc03a7ac4b 100644
--- a/getting-started.html
+++ b/getting-started.html
@@ -206,6 +206,39 @@ img { max-width: none; }
 
 
 
+  <!-- Accessibility
+  ================================================== -->
+  <div class="bs-docs-section">
+    <div class="page-header">
+      <h1 id="accessibility">Accessibility</h1>
+    </div>
+    <p class="lead">Bootstrap follows common web standards, and with minimal extra effort, can be used to create sites that are accessibile to users using assistive technology (AT). However, it's useful to take the following into consideration:</p>
+
+    <p>If your navigation contains many links and comes before your main content in the DOM, add a <code>Skip to content</code> link immediately after your opening <code>body</code> tag. <a href="http://a11yproject.com/posts/skip-nav-links/">(read why)</a></p>
+
+{% highlight html %}
+<body>
+  <a href="#content" class="sr-only">Skip to content</a>
+  ...
+  <div class="container" id="content">
+    The main page content.
+  </div>
+  ...
+</body>
+{% endhighlight %}
+
+    <p>Another "gotcha" has to do with how you nest your <code>header</code> elements. <a href="http://squizlabs.github.io/HTML_CodeSniffer/Standards/Section508/">Section 508</a> states that your largest header must be an <code>h1</code>, and the next header must be an <code>h2</code>, etc. This is hard to achieve in practice, but if the largest header on your site is smaller than Bootstrap's default 38px, you should consider modifying your stylesheets before using a smaller header element.</p>
+
+    <h4>Resources</h4>
+    <ul>
+      <li><a href="https://github.com/squizlabs/HTML_CodeSniffer">"HTML Codesniffer" bookmarklet for identifying accessibility issues</a></li>
+      <li><a href="http://a11yproject.com/">The A11Y Project</a></li>
+      <li><a href="https://developer.mozilla.org/en-US/docs/Accessibility">MDN accessibility documentation</a></li>
+    </ul>
+  </div>
+
+
+
 
   <!-- License FAQs
   ================================================== -->
diff --git a/index.html b/index.html
index d6f4cf28f0..468833fd0d 100644
--- a/index.html
+++ b/index.html
@@ -4,7 +4,7 @@ title: Bootstrap
 base_url: "./"
 ---
 
-<div class="bs-masthead">
+<div class="bs-masthead" id="content" role="main">
   <div class="container">
     <h1>Bootstrap 3</h1>
     <p class="lead">Sleek, intuitive, and powerful mobile-first front-end framework for faster and easier web development.</p>
diff --git a/javascript.html b/javascript.html
index 3dafc4ff16..2d48e26e05 100644
--- a/javascript.html
+++ b/javascript.html
@@ -196,7 +196,7 @@ $('#myModal').on('show.bs.modal', function (e) {
   <a data-toggle="modal" href="#myModal" class="btn btn-primary btn-lg">Launch demo modal</a>
 
   <!-- Modal -->
-  <div class="modal fade" id="myModal">
+  <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
     <div class="modal-dialog">
       <div class="modal-content">
         <div class="modal-header">
@@ -215,6 +215,17 @@ $('#myModal').on('show.bs.modal', function (e) {
   </div><!-- /.modal -->
 {% endhighlight %}
 
+
+    <div class="bs-callout bs-callout-warning">
+      <h4>Make modals accessible</h4>
+      <p>
+        Be sure to add <code>role="dialog"</code> to your primary modal div. In the example above, <code>div#myModal</code>.<br>
+        Also, the <code>aria-labelledby</code> attribute references your modal title. In this example, <code>h4#myModalLabel</code>.<br>
+        Finally, <code>aria-hidden="true"</code> tells assistive technologies to skip DOM elements.<br>
+        Additionally, you may give a description of your modal dialog. Use the <code>aria-describedby</code> attribute in the modal's primary <code>&lt;div&gt;</code> to point to this description (this is not shown in the above example).
+      </p>
+    </div>
+
     <h2 id="modals-usage">Usage</h2>
 
     <h3>Via data attributes</h3>
@@ -344,10 +355,11 @@ $('#myModal').on('hidden.bs.modal', function () {
 
     <h3>Within a navbar</h3>
     <div class="bs-example">
-      <div id="navbar-example" class="navbar navbar-static">
+      <div id="navbar-example" class="navbar navbar-static" role="navigation">
         <div class="container" style="width: auto;">
           <a class="navbar-brand" href="#">Project Name</a>
           <button class="navbar-toggle" type="button" data-toggle="collapse" data-target=".bs-js-navbar-collapse">
+            <span class="sr-only">Toggle navigation</span>
             <span class="icon-bar"></span>
             <span class="icon-bar"></span>
             <span class="icon-bar"></span>
@@ -481,7 +493,7 @@ $('.dropdown-toggle').dropdown()
     <h2 id="scrollspy-examples">Example in navbar</h2>
     <p>The ScrollSpy plugin is for automatically updating nav targets based on scroll position. Scroll the area below the navbar and watch the active class change. The dropdown sub items will be highlighted as well.</p>
     <div class="bs-example">
-      <div id="navbar-example2" class="navbar navbar-static">
+      <div id="navbar-example2" class="navbar navbar-static" role="navigation">
         <div class="navbar-inner">
           <div class="container" style="width: auto;">
             <a class="navbar-brand" href="#">Project Name</a>
@@ -1671,6 +1683,10 @@ $('#myCollapsible').on('hidden.bs.collapse', function () {
 </div>
 {% endhighlight %}
 
+<div class="bs-callout bs-callout-danger">
+  <h4>Accessibility issue</h4>
+  <p>The carousel component is generally not compliant with accessibility standards. If you need to be compliant, please consider other options for presenting your content.</p>
+</div>
 
     <h2 id="carousel-usage">Usage</h2>
 
diff --git a/less/scaffolding.less b/less/scaffolding.less
index b6128dc5d1..49cb16c25b 100644
--- a/less/scaffolding.less
+++ b/less/scaffolding.less
@@ -93,3 +93,17 @@ hr {
   border-top: 1px solid @hr-border;
 }
 
+// Only display content to screen readers
+// See: http://a11yproject.com/posts/how-to-hide-content/
+// -------------------------
+
+.sr-only {
+  border: 0;
+  clip: rect(0 0 0 0);
+  height: 1px;
+  margin: -1px;
+  overflow: hidden;
+  padding: 0;
+  position: absolute;
+  width: 1px;
+}