reszponzív menü feladatok
<div id="sideNavigation" class="sidenav">
<a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a>
<a href="#">About</a>
<a href="#">Features</a>
<a href="#">Contact Us</a>
</div>
<nav class="topnav">
<a href="#" onclick="openNav()">
<svg width="30" height="30" id="icoOpen">
<path d="M0,5 30,5" stroke="#000" stroke-width="5"/>
<path d="M0,14 30,14" stroke="#000" stroke-width="5"/>
<path d="M0,23 30,23" stroke="#000" stroke-width="5"/>
</svg>
</a>
</nav>
<div id="main">
<!-- Add all your websites page content here -->
</div>