getDay()?返回星期，返回的是0-6的數字，0 表示星期天。（這句話在“返回星期方法”一開始就有）。

接下來看代碼。

今天是星期天，那么var mynum=getDay()返回的是阿拉伯數字“0”，數組定義var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]，weekday[0]就是數組的第一個元素“星期日”。

ok，講完了。

var time = new Date();

var week = time.getDay();

var weekDay;

switch (week) {

???????????????????? case 0:

???????????????????? weekDay = "星期天";

???????????????????? break;

???????????????????? case 1:

???????????????????? weekDay = "星期一";

???????????????????? break;

???????????????????? case 2:

???????????????????? weekDay = "星期二";

???????????????????? break;

???????????????????? case 3:

???????????????????? weekDay = "星期三";

???????????????????? break;

???????????????????? case 4:

???????????????????? weekDay = "星期四";

???????????????????? break;

???????????????????? case 5:

???????????????????? weekDay = "星期五";

???????????????????? break;

???????????????????? case 6:

???????????????????? weekDay = "星期六";

???????????????????? break;

}

寫一個數組 week=arr[星期7，星期1，星期2，星期3，星期4，星期5，星期6]；var w=date.getDay();week[w]就是星期天

返回的是0