剑走偏锋jk
2016-07-06 20:39
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>事件处理程序</title> </head> <body> <div class="box"> <input type="button" value="按钮1" id="btn1" onclick="showMes()"/> <input type="button" value="按钮2" id="btn2" /> <input type="button" value="按钮3" id="btn3" /> </div> <script> function showMes(){ alert('hello,world!') } var btn2 = document.getElementById("btn2"); var btn3 = document.getElementById("btn3"); btn2.onclick = function(){ alert('这是用DOM0级添加的事件'); } btn2.onclick = null; /*btn3.addEventListener('click',showMes,false); btn3.addEventListener('click',function(){ alert(this.value); },false); //btn3.removeEventListener('click',showMes,false);*/ //跨浏览器事件处理程序 var eventUtil = { //添加句柄 addHandler:function(element,type,handler){ if(element.addEventListener){ element.addEventListener(element,type,false); }else if(element.attachEvent){ element.attachEvent("on"+type,handler); }else{ element["on"+type]=handler; } }, //删除句柄 removeHandler:function(element,type,handler){ if(element.removeEventListener){ element.removeEventListener(element,type,false); }else if(element.detachEvent){ element.detachEvent("on"+type,handler); }else{ element["on"+type] = null; } } } eventUtil.addHandler(btn3,'click',showMes); </script> </body> </html>
恩...因为你的DOM2写错了,
是element.addEventListener(type,handler,false);
不是你写的element.addEventListener(element,type,false);
DOM事件探秘
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