JavaScript通过attachEvent和detachEvent方法处理带参数的函数
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>无标题文档</title>
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<script language="javascript">
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var theP; //P标签对象
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var show=function(msg){ //直接定义 function show(msg) 效果是一样的
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return function(){
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alert(msg+" from show()");
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if(window.addEventListener){ //FF etc.
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theP.removeEventListener("click", theP.show11, false);
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}
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else{ //IE
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theP.detachEvent("onclick", theP.show11);
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}
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}
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}
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var show2=function(msg){ //直接定义 function show2(msg) 效果是一样的
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return function(){
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alert(msg+" from show2()");
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}
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}
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function showDef(){
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alert("showDef()");
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if(window.addEventListener){ //FF etc.
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theP.removeEventListener("click", showDef, false);
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}
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else{ //IE
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theP.detachEvent("onclick", showDef);
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}
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}
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window.onload=function(){
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theP=document.getElementById("pid");
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theP.show11=show("可以detach的带参数方法");
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if(window.addEventListener) // not IE
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{
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//for FF.etc
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theP.addEventListener("click", theP.show11, false);
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theP.addEventListener("click", showDef, false);
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}
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else
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{
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//for IE
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theP.attachEvent("onclick", theP.show11);
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theP.attachEvent("onclick", show2('不能detach的带参数方法'));//区别于上一个,这里不能detach
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theP.attachEvent("onclick", showDef); //无参数的方法直接写
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}
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}
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</script>
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</head>
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<body >
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<div >
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<p id="pid">Click Me</p>
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</div>
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</body>
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</html>
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