<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>获得星期</title>
<script type="text/javascript">
var mydate=new Date();
var myddy=mydate.getDay();//获取存储当前日期
var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
document.write("今天是：" + weekday[myddy]);
</script>
</head>
<body>
</body>
</html>
原文：http://www.cnblogs.com/gerry/p/7248784.html