源代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Wfuyu教程(wfuyu.com)</title> </head> <body> <p>点击这个按钮，获得基于时间的问候。</p> <button onclick="myFunction()">点击这里</button> <p id="demo"></p> <script> function myFunction() { var x=""; var time=new Date().getHours(); if (time<20) { x="Good day"; } else { x="Good evening"; } document.getElementById("demo").innerHTML=x; } </script> </body> </html>
运行结果：