js获取星期

语法：newDate().getDay();

功能：获取星期

返回值：number(0-6)

var week = new Date().getDay();
var str = "";
//多条件的判断  switch
switch(week){
  case 0:
  str = '日';
  break; 
  case 1:
  str = '一';
  break; 
  case 2:
  str = '二';
  break; 
  case 3:
  str = '三';
  break; 
  case 4:
  str = '四';
  break; 
  case 5:
  str = '五';
  break; 
  default:
  str = '六';
}
document.write("今天是星期"+str);