fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> </head> <body> <p id="demo">单击按钮查找按钮是否有onclick属性</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ var btn=document.getElementsByTagName("BUTTON")[0]; var x=document.getElementById("demo"); x.innerHTML=btn.getAttributeNode("onclick").specified; } </script> </body> </html>
运行结果