The following code shows how to align navbar to fixed top.
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css"
href="http://getbootstrap.com/dist/css/bootstrap.css">
<!--from w w w . j a va 2 s.c o m-->
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top"></div>
</body>
</html>