<!DOCTYPE html><html><head>?? ?<title>20160217</title></head><body>?? <input type="button" value="按鈕" id="btn">?? <script type="text/javascript">?? var eventUtil={? ??? ?addHandler:function(element,type,handler){? ??? ??? ?if (element.addEventListener){? ??? ??? ??? ?element.addEventListener(type,handler,false);? ??? ??? ?}else if(element.attachEvent){? ??? ??? ??? ?element.attachEvent("on"+type,handler);? ??? ??? ?}else {? ??? ??? ??? ?element["on"+type]=handler;? ??? ??? ?}? ??? ?}? ??? ?removeHandler:function (element,type,handler){? ??? ??? ?if (element.removeEventListener){? ??? ??? ??? ?element.removeEventListener(type,handler,false);? ??? ??? ?}else if(element.detachEvent){? ??? ??? ??? ?element.detachEvent("on"+type,handler);? ??? ??? ?}else {? ??? ??? ??? ?element["on"+type]=null;? ??? ??? ?}? ??? ?}?? }?? var btn=document.getElementById("btn");?? eventUtil.addHandler(btn,"click",show);?? function show(){? ??? ?alert("hello");?? }?? </script></body></html>
為什么跨瀏覽器事件處理程序不能執行？
wanoneQ
2016-02-18 13:19:14
