<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>IE事件流</title> <!-- 针对IE8及其以前的IE版本 添加事件：attachEvent(event,function); 移除事件：detachEvent(event,function); tips: IE中匿名函数内的this===window DOM2级事件跟DOM0级事件一样要加on --> </head> <body> <button id="btn">点击</button> <script> var btn=document.getElementById("btn"); function tan1(){ alert("弹框1"); } function tan2(){ alert("弹框2") } btn.attachEvent("onclick",tan1);//后弹出 btn.attachEvent("onclick",tan2);//先弹出 </script> </body> </html>