Bootstrap form example

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css">
<div id="menushell" style="height: 150px; width:200px; overflow-y: auto">
<ul class="nav nav-list">
    <li><a href="#">ActionScript</a></li>
    <li><a href="#">CHILL</a></li>                         
    <li><a href="#">C++</a></li>
    <li><a href="#">JAVA</a></li>
    <li><a href="#">Pascal</a></li>
    <li><a href="#">Cobol</a></li>
    <li><a href="#">Datalog</a></li>
    <li><a href="#">SQL</a></li>
    <li><a href="#">PL/SQL</a></li>
    <li><a href="#">ELAN</a></li>
</ul>   
</div>

CSS

.active {
    background-color:#ccc;
}

JavaScript

/*
$(document).ready(function(){
    $('#sidemenu').scrollTop($(".nav-list li.active").offset().top);
});
*/

//with some animation:
$(document).ready(function(){
    $('#menushell').animate({
        scrollTop: $(".nav-list li.active").offset().top
    }, 1000);
});