源代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Wfuyu教程(wfuyu.com)</title> </head> <body> <p id="demo">点击按钮显示一个随机数</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ document.getElementById("demo").innerHTML=Math.random(); } </script> </body> </html>
运行结果：