Untitled

<body>
  <div data-role="mainview">
    <header data-role="header">
      <ul data-role="tabs">
        <li data-role="tabitem" data-page="main">Main</li>
        <li data-role="tabitem" data-page="anotherpage">Another</li>
      </ul>
    </header>
    <div data-role="content">
      <div data-role="tab" id="main">
        main
      </div>
      <div data-role="tab" id="anotherpage">
        another
      </div>
    </div>
  </div>
</body>

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>An Ubuntu HTML5 application</title>
    <meta name="description" content="An Ubuntu HTML5 application">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0">

    <!-- Ubuntu UI Style imports - Ambiance theme -->
    <link href="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/css/appTemplate.css" rel="stylesheet" type="text/css" />

    <!-- Ubuntu UI javascript imports - Ambiance theme -->
    <script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/fast-buttons.js"></script>
    <script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/core.js"></script>
    <script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/page.js"></script>
    <script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/pagestacks.js"></script>
    <script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/tabs.js"></script>
    <script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/tab.js"></script>

    <!-- Cordova platform API access - Uncomment this to have access to the Javascript APIs -->
    <!-- <script src="cordova/cordova.js"></script> -->

    <!-- Application script -->
    <script src="js/app.js"></script>
  </head>

  <body>

    <div data-role="mainview">

      <header data-role="header">
        <ul data-role="tabs">
          <li data-role="tabitem" data-page="tab1">Tab 1</li>
          <li data-role="tabitem" data-page="tab2">Tab 2</li>
        </ul>
      </header>

      <div data-role="content">
          <div data-role="tab" id="tab1">
            Content of Tab1
          </div>

          <div data-role="tab" id="tab2">
             Content of Tab2
          </div>
      </div>
    </div>
  </body>
</html>

<script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/tabs.js"></script>
<script src="/usr/share/ubuntu-html5-ui-toolkit/0.1/ambiance/js/tab.js"></script>

// For your tabs
<ul data-role="tabs">
  <li data-role="tabitem" data-page="hello-page">Hello World</li>
  <li data-role="tabitem" data-page="next-page">Next</li>
</ul>

// In your content
<div data-role="tab" id="hello-page">
   ...
</div>
<div data-role="tab" id="next-page">
  ...
</div>

window.onload = function () {
   var UI = new UbuntuUI();
   UI.init();
   [...]

   // tab workaround code
   var tabs = UI.tabs.tabChildren;
   for (var i=0; i < tabs.length; i++) {
        var tab = tabs[i];
        var parent = tab.parentNode;


        tab.addEventListener("click", function() {
           var activeNotFound = true;
            for (var i=0; i < parent.children.length && activeNotFound; i++) {
               var child = parent.children[0];
               if (child.getAttribute("class") == "active") {
                  activeNotFound = false; // found the active element, stop looping
               }
               else if (child.tagName == "LI" ) {
                  parent.removeChild(child); // remove child from the front
                  parent.appendChild(child); // add it to the end
               }
           }
        });
   }

}

<ul data-role="tabs"  style="-webkit-transform: none !important;">