The following code shows how to set up type ahead.
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-1.8.3.js'></script>
<script type='text/javascript'
src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css">
<style type='text/css'>
@import url('http://twitter.github.com/bootstrap/assets/css/bootstrap.css');
.container {<!--from w w w . j a va 2s .co m-->
margin-top: 10px;
}
</style>
</head>
<body>
<div class="container">
<div class="hero-unit">
<form>
<div>
<label>typeahead</label>
<input type="text" data-provide="typeahead" autocomplete="off"
data-source='["hello","world"]' />
</div>
</form>
</div>
</diV>
</body>
</html>