Html

<!DOCTYPE html>
<html>
<head>

	<title>Intro</title>

	<link href="Style.css" rel="stylesheet">
	<link href="Intro.css" rel="stylesheet">


	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link href="css/jquery.bxslider.css" rel="stylesheet" />
	<link href="css/nav.css" rel="stylesheet">
	<link rel="shortcut icon" type="image/png" href="img/w3-favicon.png"/>
	<meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<meta name="keywords" content="footer, contact, form, icons" />
	<link rel="stylesheet" href="css/demo.css">
	<link rel="stylesheet" href="css/footer-distributed-with-contact-form.css">
	<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css">
	<link href="http://fonts.googleapis.com/css?family=Cookie" rel="stylesheet" type="text/css">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
</head>
<body>
		<script src="js/jquery-1.11.2.min.js">
	    </script>
		<script src="js/main.js">
	    </script>


	<!-- Navbar-->

	<div class="navbar">

	JJJJJ

	</div>


	<!-- Simple Intro-->
	<div class="IntroNeeded">
	<div id= "Intro">
	<div class="IntroText">
	<h2 style="font-size: 700%; font-weight: bolder; padding-bottom: 0; font-family: 'Arial'; margin-bottom: -0.3em;"> Fuchs Julian. </h2>
	<h6> Untertext </h6>
	<p id="demo"></p>
	</div>
	<a class = "button" onclick="myFunction()" href="#bottom">Bottom</a>
	<img class="IntroImg" src="Stock.png" alt="Intro">
	</div>

		<style> *{overflow: hidden;}</style>

	<script>
	function myFunction() {
    document.getElementById("demo").innerHTML = "Hello World";
	document.getElementById("Intro").innerHTML= ('');
	obj.style.overflow = "visible";
	document.navbar.style.position= "fixed";
	}

	</script>

	</div>

	<div class="MainBody">
		<br>
		<div id="bottom">
			<a href="bottom" style="font-size: 300%; text-align: center; text-transform: uppercase;">
				Welcome
			</a>
		</div>
		<h3 class="Section" style="margin-left: 5%; margin-right: 5%; color: black;"> Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eost</h3>

	</div>


</body>
</html>