【JavaScript】JS获得指定时间的星期信息

【要点】JS获得指定时间的星期信息
js实现核心代码如下：

 1 function getDateWeek(selectedDate)
 2 {
 3     var year = selectedDate.getYear();
 4     var month = selectedDate.getMonth();
 5     var day = selectedDate.getDate();
 6     var dataInfo = new Date(year, month-1, day);
 7     var week = "";
 8      switch(dateInfo.getDay())
 9      {
10         case 0:
11             week="日";
12             break;
13         case 1:
14             week="一";
15             break;
16         case 2:
17             week="二";
18             break;
19         case 3:
20             week="三";
21             break;
22         case 4:
23             week="四";
24             break;
25         case 5:
26             week="五";
27             break;
28         case 6:
29             week="六";
30             break;
31      }
32      return week;
33 }