<!DOCTYPE html>
<html>
<body>

<p id="p1">Hello World!</p>
<p id="p2">Hello World!</p>

<script>
document.getElementById("p2").style.color="blue";
document.getElementById("p2").style.fontFamily="Arial";
document.getElementById("p2").style.fontSize="larger";
</script>

<p>上面的段落已被一段脚本修改。</p>

</body>
</html>