JavaScript獲得當前日期是星期幾，主要通過getDay函數獲得當前日期是一個星期的第幾天
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 <!DOCTYPE html> <html> <body> <p id="demo"> Click the button to display todays day of the week. </p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var d = new Date(); var weekday=new Array(7); weekday[0]="Sunday"; weekday[1]="Monday"; weekday[2]="Tuesday"; weekday[3]="Wednesday"; weekday[4]="Thursday"; weekday[5]="Friday"; weekday[6]="Saturday"; var x = document.getElementById("demo"); x.innerHTML=weekday[d.getDay()]; } </script> </body> </html>