書式
日付オブジェクト.getHours()
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>Sample</title>
</head>
<body>
<script type="text/javascript"><!--
dateObj = new Date();
h = dateObj.getHours();
document.write(h+"時");
// --></script>
</body>
</html>