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              <p>
  Using HTML from <a href="http://www.marcozehe.de/2013/02/02/advanced-aria-tip-1-tabs-in-web-apps/">Advanced ARIA tip #1: Tabs in web apps</a>, slightly tweaked, and my own CSS and JavaScript.
</p>

<ul class="tabList" id="tabs" role="tablist">
  <li role="presentation"><a id="tab1" href="#panel1" onclick="showTab(1);return false;" role="tab" aria-controls="panel1" aria-selected="false">Tab 1</a></li>
  <li role="presentation"><a id="tab2" href="#panel2" onclick="showTab(2);return false;" role="tab" aria-controls="panel2" aria-selected="false">Tab 2</a></li>
  <li role="presentation"><a id="tab3" href="#panel3" onclick="showTab(3);return false;" role="tab" aria-controls="panel3" aria-selected="false">Tab 3</a></li>
</ul>

<div class="tabPanels">
  <div id="panel1" role="tabpanel" aria-labelledby="tab1">
  <p>
    Nulla tincidunt pharetra tortor. In dapibus ultricies arcu. Suspendisse at purus eu est tincidunt feugiat. Praesent <a href="foo">et sapien></a>. Vivamus fermentum, diam vel ornare vestibulum, nibh massa imperdiet lectus, eget tincidunt urna urna nec erat. Curabitur interdum. Nam lorem nunc, posuere quis, suscipit eu, hendrerit vitae, nisi. Etiam hendrerit tincidunt felis.
  </p>
  </div>

  <div id="panel2" role="tabpanel" aria-labelledby="tab2">
  <p>
    Vestibulum id eros eu lorem tincidunt sollicitudin. Suspendisse ligula. Sed nisi magna, elementum at, ultricies in, tincidunt imperdiet, quam. Nulla semper. <a href="foo">Suspendisse potenti</a>. Sed sollicitudin dolor aliquet purus. Aliquam dui. Proin arcu metus, porttitor eget, pulvinar nec, molestie dapibus, ligula.
  </p>
  </div>

  <div id="panel3" role="tabpanel" aria-labelledby="tab3">
    <p>
      Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Aliquam vel erat. <a href="foo">Vestibulum egestas purus ut felis</a>. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.
    </p>
  </div>
</div>

<script>
  showTab(1);
</script>
            
          
!
            
              .html {
  background-color: #ccc;
	/*background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAACVBMVEUAAAAAAAAAAACDY+nAAAAAA3RSTlMmDQBzGIDBAAAAG0lEQVR42uXIIQEAAADCMHj/0NdkQMws0HEeAqvwAUGJthrXAAAAAElFTkSuQmCC);*/
  color: #000;
  font-family: Arial, Helvetica, sans-serif;
}

.tabList {
  list-style-type: none;
  padding: 0;
  margin: 0 auto;
}

.tabList a {
  display: block;
  float: left;
  border: 1px solid #000;
  padding: .25em 2em;
  margin: 0 0 -1px .25em;
  border-radius: .5em .5em 0 0;
  background-color: #aaa;
}

.tabList a:link, .tabList a:visited, .tabList a:hover, .tabList a:focus, .tabList a:active {
  text-decoration: none;
  color: #000;
}

.tabList a:hover, .tabList a:focus {
  background-color: #ccc;
}

.tabList a.selected {
  background-color: #fff;
  border-bottom: 1px solid #fff;
}

.tabPanels div {
  clear: left;
  margin: 0 auto;
  padding: 1em 2em;
  border: 1px solid #000;
  border-radius: .25em;
  background-color: #fff;
  display: none;
}

.tabPanels div.selected, div[aria-hidden=false] {
  display: block;
}

.hide, div[aria-hidden=true] {
  display: none;
}



            
          
!
            
              var OpenTab;

function showTab(num) {
  try{
      if(OpenTab!=undefined){
        var OldTabID = document.getElementById('tab'+OpenTab);
        var OldPanelID = document.getElementById('panel'+OpenTab);
        OldTabID.className = '';
        OldPanelID.className = 'hide';
        OldTabID.setAttribute('aria-selected', false);
        OldPanelID.setAttribute('aria-hidden', true);
      }
      var TabID = document.getElementById('tab'+num);
      var PanelID = document.getElementById('panel'+num);
      TabID.className = 'selected';
      PanelID.className = 'selected';
      TabID.setAttribute('aria-selected', true);
      PanelID.setAttribute('aria-hidden', false);
      OpenTab = num;
  }catch(e){}
}

showTab(1);
            
          
!
999px
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