<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<nav id="main-menu" class="navbar navbar-default navbar-fixed-top top-nav-collapse" role="banner">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">LOGO</a>
</div>
<div class="collapse navbar-collapse navbar-right">
<ul class="nav navbar-nav">
<li class="scroll active"><a href="#">Home</a></li>
<li class="scroll"><a href="#">About Us </a></li>
<li class="dropdown mega-dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Services<span class="caret"></span></a>
<ul class="dropdown-menu mega-dropdown-menu">
<li class="col-sm-4">
<ul>
<li class="dropdown-header">Features</li>
<li><a href="#">Auto Carousel</a></li>
<li><a href="#">Carousel Control</a></li>
<li><a href="#">Right Navigation</a></li>
<li><a href="#">Four Columns Grid</a></li>
</ul>
</li>
<li class="col-sm-4">
<ul>
<li class="dropdown-header">Plus</li>
