<body>
<script language="javascript" type="text/javascript">
document.write("<h1>Hello</h1>");
document.write("<h1>Hello</h1>");
document.writeln("<h1>Hello</h1>");
document.writeln("<h1>Hello</h1>");
</script>
<p>
<input id="Button1" type="button" value="button" onclick="document.body.innerHTML = '';" /></p>
</body>
