<!doctype html> <html> <head> <meta charset="utf-8"> <meta name="author" content="智能社 - zhinengshe.com" /> <meta name="copyright" content="智能社 - zhinengshe.com" /> <title>智能社 - www.zhinengshe.com</title> <!-- this:当前事件发生的对象 this常见错误：- window 1 定时器 2 attachEvent 包了一次 3 行间 --> <script> function show(){ alert(this); } window.onload = function(){ var aInput = document.getElementsByTagName("input"); aInput[0].onclick = function(){ show(); // win }; aInput[1].onclick = show;//input aInput[2].onclick = function(){ setTimeout(show,1000);//win }; aInput[aInput.length - 1].attachEvent("onclick",show);// ie 浏览器 win }; </script> </head> <body> <input type="button" value="按钮0" /> <input type="button" value="按钮1" /> <input type="button" value="按钮2" /> <input type="button" value="按钮3" onclick="show();"/> <input type="button" value="按钮4" /> </body> </html>