Example
<div class="container" id="con">
<div class="row">
<div class="span12">
<div class="well">
<h1> Header </h1>
</div>
</div>
</div>
</div>
<div class="container" data-spy="affix" data-offset-top="400" id="nav">
<div class="navbar">
<div class="navbar-inner">
<div class="container">
<div class="span12">
<a class="brand" href="#">Home</a>
<ul class="nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">Link</a></li>
<li><a href="#">Link</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
<div class="container">
<div class="span3">
<p style="height:1000px;padding:10px;">
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</p>
</div>
</div>
<style>
#con .well {
height:400px;
}
#nav.affix {
position: fixed;
top: 0;
width: 100%
}
</style>
<script>
$('#nav').affix();
</script
