js根据日期获取星期

js中提供了getDay()这样的一个函数，返回值为  0-6  代表星期日、星期一、、、星期六

用法：

var week=new Date().getDay();if(week==0){week="星期日";}else if(week==1){week="星期一";}else if (week == 2) {week = "星期二";}else if (week == 3) {week = "星期三";}else if (week == 4) {week = "星期四";}else if (week == 5) {week = "星期五";}else if (week == 6) {week = "星期六";}