<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html;charset=UTF-8">
<title>javascript在页面中输出</title>
<script type="text/javascript">
document.write("这是javascript代码<br/>");
</script>
</head>
<body>
<h2>这是html代码</h2>
</body>
</html>