看看我错在哪里
<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 weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
var mynum=mydate.getDate();
document.write("今天是:"+mynum+"</br>");
document.write("今天是："+weekday[mynum]);
</script>
</head>
<body>
</body>
</html>
