The following code shows how to put form to dropdown under navbar.
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-1.10.1.js'></script>
<script type='text/javascript'
src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<style type='text/css'>
@import url('http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css');
</style><!--from w ww. j a v a2s . c o m-->
<script type='text/javascript'>
$(window).load(function(){
$('.this-works').on('shown.bs.dropdown', function () {
var inputField = $(this).find("input:text").first();
var x = setTimeout(function(){inputField.focus()}, 100);
});
$('.this-doesnt').on('shown.bs.dropdown', function () {
var inputField = $(this).find("input:text").first().focus();
});
});
</script>
</head>
<body>
<body>
<div class="container">
<!-- Static navbar -->
<div class="navbar navbar-default">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse"
data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Project name</a>
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li><a href="#">Link</a></li>
<li class="dropdown this-works">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Works
<b class="caret"></b></i></a>
<div class="dropdown-menu dropdown-form">
<form class="form-inline" role="form">
<div class="input-group">
<input type="text" class="form-control" placeholder="Search"
id="InputSearch" class="form-control">
<span class="input-group-btn">
<button class="btn btn-default" type="button">GO</button>
</span>
</div>
<!-- /input-group -->
</form>
</div></li>
<li class="dropdown this-doesnt"><a href="#"
class="dropdown-toggle" data-toggle="dropdown">Broken <b
class="caret"></b></i></a>
<div class="dropdown-menu dropdown-form">
<form class="form-inline" role="form">
<div class="input-group">
<input type="text" class="form-control" placeholder="Search"
id="InputSearch" class="form-control"> <span
class="input-group-btn">
<button class="btn btn-default" type="button">GO</button>
</span>
</div>
<!-- /input-group -->
</form>
</div></li>
</ul>
</div>
<!--/.nav-collapse -->
</div>
</div>
</body>
</body>
</html>