JSFiddle - React, Tailwind, and code Playground
HTML
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<div class="navbar navbar-default navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<a class="navbar-brand" href="Pocetna.aspx">Sportski događaji</a>
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#padajuci">
<span class="glyphicon glyphicon-th"></span> </button>
</div>
<div class="collapse navbar-collapse" id="padajuci">
<ul class="nav navbar-nav">
<li><a href="Pocetna.aspx">Početna</a></li>
<li><a href="Admin.aspx">Admin</a></li>
<li><a href="About.apsx">About</a></li>
</ul>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row">
<div class="col-sm-12">
<img class="img-responsive" src="http://placehold.it/700x100" style="margin-left:auto; margin-right:auto; margin-top: 50px" />
</div>
</div>
</div>