Hi,

You can achieve your requirement using simple JavaScript snippet!

Check the below code!

<div>
        <div id="header" class="header">
            <h1>My Header</h1>
        </div>
        <input type="button" onclick="HideHeader();" value="Hide" />

    </div>
    <script type="text/javascript">
        function HideHeader() {
            document.getElementById('header').style.display="none";
        }
    </script>

Hope it helps u...