Mitől lehet ez?

<header>

<!-- header-area start -->

<div id="sticker" class="header-area">

<div class="container">

<div class="row">

<div class="col-md-12 col-sm-12">

<!-- Navigation -->

<nav class="navbar navbar-default">

<div class="navbar-header">

<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".bs-example-navbar-collapse-1" aria-expanded="false">

<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 page-scroll sticky-logo" href="index.html">

<img src="img/logo.png" alt="aaa" title="mylogo">

</a>

</div>

<div class="collapse navbar-collapse main-menu bs-example-navbar-collapse-1" id="navbar-example">

<ul class="nav navbar-nav navbar-right">

<li class="active">

<a class="page-scroll" href="#home">xxxx</a>

</li>

<li>

<a class="page-scroll" href="#about">xxxx</a>

</li>

<li>

<a class="page-scroll" href="#services">xxxxx</a>

</li>

<li>

<a class="page-scroll" href="#portfolio">xxxxx</a>

</li>

<li>

<a class="page-scroll" href="#contact">xxxxxxx</a>

</li>

</ul>

</div>

<!-- navbar-collapse -->

</nav>

</div>

</div>

</div>

</div>