W3School TIY Editor
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<!DOCTYPE html> <html> <body> <p id="demo"></p> <script> var day; switch (new Date().getDay()) { case 0: day = "周日"; break; case 1: day = "周一"; break; case 2: day = "周二"; break; case 3: day = "周三"; break; case 4: day = "周四"; break; case 5: day = "周五"; break; case 6: day = "周六"; } document.getElementById("demo").innerHTML = "今天是" + day; </script> </body> </html>