function $(id)
{
return document.getElementByIdx_x(id);
}
var ev = null;
var count1  = 0;
var count2  = 0;
var oncount1 = 0;
var oncount2 = 0;
var isSetEv1 = false;
var isSetEv2 = false;
//創(chuàng)建事件的通用函數(shù)
var EventUtil = function(){};
var flag = new Flag();
//監(jiān)控變量值
function Flag()
{
var tempflag = false;
var method = null;
this.SetMethod = function(value)
{
  method = value;
} 
this.SetValue = function(value)
{
    tempflag = value;
    if(tempflag == true && method){eval_r(method)} 
}
this.GetValue = function()
{
  return tempflag;
}
}
EventUtil.addEventHandler = function(obj,EventType,Handler)
{
//如果是FF
if(obj.addEventListener)
{
  obj.addEventListener(EventType,Handler,false);
} 
//如果是IE
else if(obj.attachEvent)
{
  obj.attachEvent('on'+EventType,Handler);
} 
else
{
  obj['on'+EventType] = Handler;
}
}
//取消事件傳入的參數(shù)值要跟綁定時(shí)完全一樣才可以
EventUtil.removeEventHandler = function(obj,EventType,Handler)
{
//如果是FF
if(obj.removeEventListener)
{
  obj.removeEventListener(EventType,Handler,false);
} 
//如果是IE
else if(obj.detachEvent)
{
  obj.detachEvent('on'+EventType,Handler);
} 
else
{
  obj['on'+EventType] = Handler;
}
}
function setEvent1(e)
{
ev = e;//針對(duì)火狐獲取event相關(guān)屬性 
flag.SetMethod('addList1()');
flag.SetValue (true);
}
function setEvent2(e)
{
ev = e;//針對(duì)火狐獲取event相關(guān)屬性
flag.SetMethod('addList2()');
flag.SetValue (true);
}
function isSetEvent1(state)
{
isSetEv1 = state;//ie下方法名不能和全局變量名相同
}
function isSetEvent2(state)
{
isSetEv2 = state;
}
function add1(obj)
{
oncount1 = oncount1 + 1;
if(isSetEv1)
{
  obj.innerHTML = "設(shè)置了事件，添加了 <b>" + oncount1 + "</b> 篇文章,左邊列表1自動(dòng)增加！";
}
else
{
  obj.innerHTML = "沒有設(shè)置事件，添加了 <b>" + oncount1 + "</b> 篇文章,左邊列表1沒有變化！";
}
}
function add2(obj)
{
oncount2 = oncount2 + 1;
if(isSetEv2)
{
  obj.innerHTML = "設(shè)置了事件，添加了 <b>" + oncount2 + "</b> 篇文章,左邊列表2自動(dòng)增加！";
}
else
{
  obj.innerHTML = "沒有設(shè)置事件，添加了 <b>" + oncount2 + "</b> 篇文章,左邊列表2沒有變化！";
}
}
function addList1()
{
count1 = count1 + 1;
$("list1").innerHTML = "動(dòng)態(tài)添加了 <b>" + count1 + "</b> 篇文章了!";
}
function addList2()
{
count2 = count2 + 1;
$("list2").innerHTML = "動(dòng)態(tài)添加了 <b>" + count2 + "</b> 篇文章了!";
}

再來看看一個(gè)簡化的例子：

//通用的添加和刪除事件的方法(兼容IE和firefox)
function AddEventHandler(oTarget, sEventType, fnHandler){
  if (oTarget.addEventListener) {//非IE
  oTarget.addEventListener(sEventType, fnHandler, false);
  }else if (oTarget.attachEvent) {//IE
   oTarget.attachEvent('on' + sEventType, fnHandler);
  }else {
   oTarget['on' + sEventType] = fnHandler;
  }
}
function RemoveEventHandler(oTarget, sEventType, fnHandler){
  if (oTarget.removeEventListener) {//非IE
  oTarget.removeEventListener(sEventType, fnHandler, false);
  }else if (oTarget.detachEvent) {//IE
   oTarget.detachEvent('on' + sEventType, fnHandler);
  }else {
   oTarget['on' + sEventType] = null;
  }
}

最后再來看一個(gè)完整的實(shí)例：

<!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>JavaScript添加、刪除事件的方法</title>
<script type="text/javascript">
var EventUtil=new Object;
EventUtil.addEvent=function(oTarget,sEventType,funName){
  if(oTarget.addEventListener){//for DOM;
 oTarget.addEventListener(sEventType,funName, false);
 }else if(oTarget.attachEvent){
 oTarget.attachEvent("on"+sEventType,funName);
 }else{
 oTarget["on"+sEventType]=funName;
 }
};
EventUtil.removeEvent=function(oTarget,sEventType,funName){
  if(oTarget.removeEventListener){//for DOM;
 oTarget.removeEventListener(sEventType,funName, false);
 }else if(oTarget.detachEvent){
 oTarget.detachEvent("on"+sEventType,funName);
 }else{
 oTarget["on"+sEventType]=null;
 }
};
function removeClick(){
 alert("click");
 var oDiv=document.getElementById("odiv");
 oDiv.style.cursor="auto";
 EventUtil.removeEvent(oDiv,"click",removeClick);
}
function addLoadEvent(func){
  var oldonload=window.onload;
  if(typeof window.onload !="function"){
    window.onload=func;
  }else{
    window.onload=function(){
      oldonload();
      func();
    }
  }
}
addLoadEvent(addClick);
function addClick(){
 var oDiv=document.getElementById("odiv");
 oDiv.style.cursor="pointer";
 EventUtil.addEvent(oDiv,"click",removeClick);
}
</script>
</head>
<body>
<p>第一次點(diǎn)的時(shí)候彈出警告，并移除click事件,再點(diǎn)點(diǎn)擊就失效了</p>
<div id="odiv" style="background:#003399; height:70px; width:126px; margin:0 auto; color:skyblue; ">第一次警告，第二次沒反應(yīng)！</div>
</body>
</html>

希望本文所述對(duì)大家的javascript程序設(shè)計(jì)有所幫助。

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