The following code shows how to show tab in Javascript.
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet"
href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
<link rel="stylesheet"
href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap-theme.min.css">
<script type="text/javascript"
src="http://code.jquery.com/jquery.min.js"></script>
<script
src="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){ <!--from www. j a v a 2s . c o m-->
$("#myTab a").click(function(e){
e.preventDefault();
$(this).tab('show');
});
});
</script>
<style type="text/css">
.bs-example {
margin: 20px;
}
</style>
</head>
<body>
<div class="bs-example">
<ul class="nav nav-tabs" id="myTab">
<li class="active"><a href="#sectionA">Section A</a></li>
<li><a href="#sectionB">Section B</a></li>
<li class="dropdown"><a data-toggle="dropdown"
class="dropdown-toggle" href="#">Dropdown <b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href="#dropdown1">Dropdown1</a></li>
<li><a href="#dropdown2">Dropdown2</a></li>
</ul></li>
</ul>
<div class="tab-content">
<div id="sectionA" class="tab-pane fade in active">
<h3>Section A</h3>
<p>Aliquip placeat salvia cillum iphone. Seitan aliquip quis
cardigan american apparel, butcher voluptate nisi qui. Raw denim
you probably haven't heard of them jean shorts Austin. Nesciunt
tofu stumptown aliqua, retro synth master cleanse. Mustache cliche
tempor, williamsburg carles vegan helvetica. Reprehenderit butcher
retro keffiyeh dreamcatcher synth.</p>
</div>
<div id="sectionB" class="tab-pane fade">
<h3>Section B</h3>
<p>Vestibulum nec erat eu nulla rhoncus fringilla ut non neque.
Vivamus nibh urna, ornare id gravida ut, mollis a magna. Aliquam
porttitor condimentum nisi, eu viverra ipsum porta ut. Nam
hendrerit bibendum turpis, sed molestie mi fermentum id. Aenean
volutpat velit sem. Sed consequat ante in rutrum convallis. Nunc
facilisis leo at faucibus adipiscing.</p>
</div>
<div id="dropdown1" class="tab-pane fade">
<h3>Dropdown 1</h3>
<p>WInteger convallis, nulla in sollicitudin placerat, ligula
enim auctor lectus, in mollis diam dolor at lorem. Sed bibendum
nibh sit amet dictum feugiat. Vivamus arcu sem, cursus a feugiat
ut, iaculis at erat. Donec vehicula at ligula vitae venenatis. Sed
nunc nulla, vehicula non porttitor in, pharetra et dolor. Fusce nec
velit velit. Pellentesque consectetur eros.</p>
</div>
<div id="dropdown2" class="tab-pane fade">
<h3>Dropdown 2</h3>
<p>Donec vel placerat quam, ut euismod risus. Sed a mi suscipit,
elementum sem a, hendrerit velit. Donec at erat magna. Sed
dignissim orci nec eleifend egestas. Donec eget mi consequat massa
vestibulum laoreet. Mauris et ultrices nulla, malesuada volutpat
ante. Fusce ut orci lorem. Donec molestie libero in tempus
imperdiet. Cum sociis natoque penatibus et magnis dis parturient.</p>
</div>
</div>
</div>
</body>
</html>