輸出有問題
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>獲得星期</title>
<script type="text/javascript">
? var mydate=new Date(2019,8,18);
? document.write(mydate+"<br/>")
? 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[mydate.getDay()]);
</script>
</head>
<body>
</body>
</html>
結果應該是星期天 ? ? ? ?實際輸出星期三
2019-08-19
var mydate=new Date(2019,8,18);月份是0到11 你想8月的話 那就改成7 不知道這么解釋對不對