<html>
<body>
<h1 id="myH1"></h1>
<p id="myP"></p>
<script>
// 输出标题：
document.getElementById("myH1").innerHTML="Welcome to my Homepage";
// 输出段落：
document.getElementById("myP").innerHTML="This is my first paragraph.";
</script>
<p><b>注释：</b>注释不会被执行。</p>
</body>
</html>