Switch 语句

  1. <!DOCTYPE html>
  2. <html>
  3. <body>
  4.  
  5. <p id="demo"></p>
  6.  
  7. <script>
  8. var day;
  9. switch (new Date().getDay()) {
  10.   case 0:
  11.     day = "周日";
  12.     break;
  13.   case 1:
  14.     day = "周一";
  15.     break;
  16.   case 2:
  17.     day = "周二";
  18.     break;
  19.   case 3:
  20.     day = "周三";
  21.     break;
  22.   case 4:
  23.     day = "周四";
  24.     break;
  25.   case 5:
  26.     day = "周五";
  27.     break;
  28.   case  6:
  29.     day = "周六";
  30. }
  31. document.getElementById("demo").innerHTML = "今天是" + day;
  32. </script>
  33.  
  34. </body>
  35. </html>