Using "navbar" along with "navbar-fixed-top" class floats the navigation bar on top of the page when you scroll the page down. This doesn't seem to work on mobile/ipad browsers. Why and how do we make them float on mobile browsers as well. Tried this on ipad(safari, chrome) Android(firefox) Windows Phone(IE).

```
<!DOCTYPE HTML>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <script src="http://code.jquery.com/jquery.min.js"></script>

    <script type="text/javascript" src="http://twitter.github.com/bootstrap/assets/js/bootstrap.js"></script>
    <link href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css" rel="stylesheet">
    <link href="http://twitter.github.com/bootstrap/assets/css/bootstrap-responsive.css" rel="stylesheet">

</head>

<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
  <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
  </a>
  <span class="brand"><img title="Logo" alt="Logo" src="static/images/iu_logo.gif" /></span>
  <div class="nav-collapse">
  <ul class="nav">
    <li class="active">
        <a id="homeLink" href="#">Home</a>
    </li>
    <li class="dropdown">
      <a class="dropdown-toggle" id="newsLink" href="#">News</a>
      <ul class="dropdown-menu">
        <li><a href="#">Link 1</a></li>
        <li><a href="#">Link 2</a></li>
        <li class="divider"></li>
        <li><a href="#">Another link</a></li>
      </ul>
    </li>
  </ul>
  <ul class="nav pull-right">
    <li id="loginLink"><a href="#" id="loginButton">Login</a></li>
  </ul>
  </div>
</div>
</div>
50 lines of text (just to have the page scrollable)
</body>
</html>

```

I do have the below line in the head tag to enable bootstrap-responsive for mobile devices.

```
<meta name="viewport" content="width=device-width, initial-scale=1.0">

```

Any suggestions