Any Need For AddEventListener() And AttachEvent() At All?

Nov 16, 2006

Today I have been testing the event models from Netscape 4.8 and IE 4
to the current crop of browsers. I'd like to write a small event
library similar in purpose to the Yahoo! UI event library but with less
features and code. The Yahoo! event library is one of the best
libraries in YUI but it still seems to me to have some confused
code...that or I'm still confused.

The Yahoo! UI library focuses on using addEventListener and
attachEvent. However, due to the click and dblclick bugs in Safari a
long legacy event workaround is included to use a Netscape4-type event
model for Safari. Something like this

var listeners = [function(event){}, function(event){}];
document.getElementById('blue').onmouseover = function(event) {
for (var i=0; i<listeners.length; i++) {

With this above example, multiple handler functions can be fired for a
single event. I imagine that this is an old trick that has been around
for a long time, yes?

With all the new browsers I tested with this legacy workaround, the
listener handlers can use event.stopPropogation() or
event.cancelBubble=true and they work as desired. The handler functions
can also use event.preventDefault() and event.returnValue=false and
they too work. These seem to work because the event object passed to
the handlers is a modern event object and not one from Netscape4.

My question is, if Safari needs this legacy workaround, and the legacy
workaround seems to work in all the browsers that have addEventListener
or attachEvent, then why bother with the addEventListener and
attachEvent functions at all? Why not just use the legacy way for all
browsers and all type of events.?

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Compatibility - AttachEvent Vs AddEventListener Vs Other?

Mar 17, 2003

As I understand it so far:

IE 5+ for PC

Gecko, KHTML

NS3+, IE4+, dunno about opera or others

Since I'm only concerned with attaching a single event and don't care about bubbling/capturing, am I best off not using the old style of event registering to assure maxium compatibility?

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Register A Click Event Onto A Input Element With AddEventListener And AttachEvent

Dec 19, 2009

I'm just trying to register a simple click event onto a input element with addEventListener and attachEvent... My code:


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Why I Can't Use AttachEvent With InnerHTML;

Apr 27, 2007

if i use AttachEvent like this,it can't work;

var img = document.createElement("img");
var div = document.createElement("div");
div.appendChild(img); //can't work;
div.innerHTML="<-click this";

but i use attachEvent like this,it work; eg:

var img = document.createElement("img");
var text = document.createElement("span");
text.innerHTML="<-click this";
var div = documet.createElement("div");

div.appendChild(img); //can work

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Dynamic Variables In AttachEvent

Jan 24, 2007

I am trying to write a loop that will add 10 divs to the screen. Each
div will have an onclick event. The function that will be called
onclick requires a parameter. That parameter is dynamic based on the
index of the loop. In Firefox this is no problem. However in IE I get
some results that I wouldn't expect.

Here is my code:

for(var i = 0; i < 10; i++)
var linename = jsonObj.lines[i].line;
var childcountid = jsonObj.lines[i].childcount;
var lineid = jsonObj.lines[i].lineid;

var newdiv = document.createElement('div');
newdiv.setAttribute("id","main" + i);
if (navigator.appName == "Microsoft Internet Explorer")
//************ this is the problem area
newspan.attachEvent("onclick", function() {getCategories('main' +
newspan.setAttribute("onclick", "getCategories('main" + i + "')");
document.getElementById('container').appendChild(n ewdiv);

What happens is when the element is clicked the parameter being passed
to getCategories is always 'main9' IE always grabs the current value
of i, not the value of i at the stage of the loop that attachEvent was

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How To Discover If AttachEvent Was Done To An Element

Aug 28, 2007

I need to check if attachEvent was done to an element. The problem is that attachEvent does not save this information anywhere.

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Multiple AttachEvent On Document?

Oct 26, 2006

Does anyone know of a way to attach multiple events to the document element?

I have a class that when initiated attaches events to the element it effects but also attaches an event to the document element.

If my class is declared more then once, only one of the classes will be effected by the event (on the document element) where as I need both.

this.addEvent = function(obj, type, fn )
obj['e'+type+fn] = fn;
obj[type+fn] = function()
obj['e'+type+fn]( window.event );
obj.attachEvent( 'on'+type, obj[type+fn] );
obj.addEventListener( type, fn, false );

I presume it works fine on Firefox because addEventListening allows multiple assignments where as attachEvent doesn't.

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AttachEvent - Container (player) Responds As Expected In All Browsers Except Ie

Sep 8, 2010

The event added to the flash object (videoPlayer) or to its container (player) responds as expected in all browsers except ie. I trtied everything I could possibly think of and still can't get it work in ie. The only event that works in ie is "onactivate".


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Window.attachEvent - Get 'Object Doesn't Support This Property Or Method' - In IE8

Oct 4, 2011

I have a cross domain iframe resizing script (using postMessage) that works perfectly in Chrome, FF, Safari and IE9 - browsers that use addEventListener I'm trying to get it to work in IE8 by adding what I thought was the right language for attachEvent, but it's not working in IE8 - I just get 'Object doesn't support this property or method' - again just in IE8.


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AttachEvent - Send Data Back To The Parent Page To Create New Table Rows

Jan 13, 2009

A page I'm working on lets users open a new window, which in turn lets them send data back to the parent page to create new table rows, cells, links, etc. One of the links created is "delete", so it should delete the row that the delete link belongs to when clicked on. I can do this no problem in ff using the setAttribute('onclick',onClickEvent), but can't do this in IE. I'll show some code to make this easier to understand....


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AddEventListener For IE 5+

Sep 21, 2005

This makes my life a bit easier. After executing this script you should be able to addEventListener on all elements instead of determining if you want to call attachEvent or addEventListener.
Edit: This is the original version. The revised version is below
if (!document.addEventListener && document.attachEvent)
Object.prototype.addEventListener = function(eventName, func, capture)
if (this.attachEvent)
this.attachEvent('on' + eventName, func);

var i, l = document.all.length;

for (i = 0; i < l; i++)
document.all[i].addEventListener = Object.prototype.addEventListener;

window.addEventListener = Object.prototype.addEventListener;
document.addEventListener = Object.prototype.addEventListener;

Revised version:

This one is harder to use but it is nicer to the DOM and all newly created objects. The problem with it is that addEventListener will only be available after the page loads.

If you want to use addEventListener from a window.onload script make sure that this code is included in the body, not in the head. document.body.onload is called before window.onload.

Now, only elements that already have attachEvent will get an addEventListener. Elements created with document.createElement will automatically get addEventListener.

function createIEaddEventListeners()
if (document.addEventListener || !document.attachEvent)

function ieAddEventListener(eventName, handler, capture)
if (this.attachEvent)
this.attachEvent('on' + eventName, handler);

function attachToAll()
var i, l = document.all.length;

for (i = 0; i < l; i++)
if (document.all[i].attachEvent)
document.all[i].addEventListener = ieAddEventListener;

var originalCreateElement = document.createElement;

document.createElement = function(tagName)
var element = originalCreateElement(tagName);

if (element.attachEvent)
element.addEventListener = ieAddEventListener;

return element;

window.addEventListener = ieAddEventListener;
document.addEventListener = ieAddEventListener;

var body = document.body;

if (body)
if (body.onload)
var originalBodyOnload = body.onload;

body.onload = function()
body.onload = attachToAll;
window.addEventListener('load', attachToAll);


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How To Use AddEventListener Function For IE

Apr 19, 2009

I was using this script to learn how to use event listeners and I need to know how to make it work for IE. I keep finding attachEvent scripts that look like they will work, but I get nothing. I've spent several hours finding script after script that simply don't work. I don't know where to turn next. Any script to attach these events to IE?

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "[URL]">
<script type="text/javascript">

if(! = function(f) { for(var Obect1 = new Array(), i = 0, n = this.length, t = arguments[1]; i < n; i++) Obect1[i] =, this[i], i, this);return Obect1;};
Array.prototype.linkMethod = function(m) { var n = this.length, args =, 1);if(typeof m == "string" && n > 0) m = this[0][m];for(var Obect2 = [], i = 0; i < n; i++) Obect2[i] = m.apply(this[i], args);return Obect2;}; .....

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AddEventListener In IE Failes

Oct 20, 2006

I'm trying to add a clickevent to an anchor that I created trough DOM.
This his how the code looks:

var oSubLink = document.createElement("A");
oSubLink.addEventListener("click", klapUit(, eigenschappen[2]), false);

It failes at the addEventListener call, saying "No such interface supported" (appears to be one of the two default error messages IE gives when it can't handle your JS :mad: ).

How can I fix this? The solution should work in IE6, FF, Opera, Mozilla and Safari.

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AddEventListener Parameters

Jul 12, 2007

Is there a way to send parameters to the function being added to an event with addEventListener. I.E. say you have this function

function someFcn(i){
and I add it to an object.

someElement.addEventListener('focus', someFcn, false);
Is there a way to send a parameter to someFcn.
For Example I have tried this but it failed

var someString = 'Hello World'
someElement.addEventListener('focus', someFcn(someString), false);

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AddEventListener In For Loop?

Sep 9, 2011

I have this code:

for(var h:Number=0; h<4; h++){
var Build : Button;
Build = new Button();
Build.height = 20;


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Using Object Methods In AddEventListener

Jul 20, 2005

When you use addEventListener (or addEvent in IE) to call an object
method, does it call it with the correct this parameter?

The ECMAScript reference has a lot to say about the caller using or Function.prototype.apply and passing the
correct this pointer for the context, but how does addEventListener
determine the correct this pointer. Or does it just punt and pass the
global context, thus making it impossible to refer to the object this
in an object method used as an event listener?

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AddEventListener For Radio Buttons With Same Id?

Jun 1, 2011

Is it possible to add events using addEventListener to multiple radio buttons with same id ?

<input id="radId" type="radio" value="0" name="radioname">No
<input id="radId" type="radio" value="1" name="radioname">Yes

I tried to attach event using document.getelementByID BUT it always picks the first radio button.

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AddEventListener() For CtrlEnter Event

Feb 11, 2007

Task: I would like to implement a CtrlEnter event that would work on both IE and FF.

My approach: use addEventListener() and attachEvent() to capture the event then trigger a function to check for CtrlEnter:
if (oTarea.addEventListener) {
oTarea.addEventListener('keyup', function() {checkCtrlEnter(event);}, false);
else if (oTarea.attachEvent) {
oTarea.attachEvent('onkeyup', function() {checkCtrlEnter(event);});

function checkCtrlEnter(e) {
if (e.ctrlKey && e.keyCode == 13) {
// do something
return false;

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AddEventListener With Member Functions

Sep 20, 2009

I'm having problem setting up event handling using member functions. Consider the following code snippet:


The problem is that I get a


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AddEventListener And Member Functions?

Sep 20, 2009

I'm having problem setting up event handling using member functions. Consider the following code snippet:

function Widget()
this.register = function()
document.getElementById('click', this.default_click_handler, false);
this.default_click_handler = function(event)


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Get Function Handle From Name In AddEventListener?

Mar 14, 2010

I have got a following function:

PHP Code:
function addEvent(obj, type, fn) {
if (obj.addEventListener)


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FireFox: AddEventListener Vs. Window.onerror

Nov 30, 2006

I've been using window.onerror to capture and report JavaScript errors
from other users for debugging an application I've written. But I've
run into a strange issue with Firefox and window.onerror.

It seems that any code that executes, having originated from an
"element.addEventListener", causing an error does not activate
"window.onerror". But it does at least show up in Firefox's JavaScript
error console. Internet Explorer doesn't appear to suffer from the
same issue when it uses it's equivalent "element.attachEvent".

Does anyone know why this is and if there is any workarounds or if it's
possibly a bug? Code:

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JQuery :: AddEventListener Works When Bind Don't?

Oct 22, 2011

i'm loading a simple svg file with the embed html tag:<embed height

' id


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AddEventListener Accepting Functions With Arguments?

Jan 29, 2006

I am trying to create a script that will cover cross-browser limitations in adding event listeners to elements. I have found plenty of resources to add a listener but can't find any way of assigning a function containing arguments. Here is what I have so far:

/* Attach events regardless of browser */

function addEvent(obj, evType, fn)
if (obj.addEventListener)
obj.addEventListener(evType, fn, false);
return true;
else if (obj.attachEvent)
var r = obj.attachEvent("on"+evType, fn);
return r;
return false;

/* Contains all attachments to be made on page load */

function load()
item = document.getElementById('toggleControl');
addEvent(item, 'click', toggle);

item = document.getElementById('alertLink');
addEvent(item, 'click', runAlert);

/* Add event to page load and assign load() function */

addEvent(window, 'load', load);

The actual functions for toggle and runAlert are in a seperate .js file, but are standard functions. the problem is that I can't find a way to perform the equivalent of:

item = document.getElementById('toggleControl');
addEvent(item, 'click', toggle('toggleID'));

It simply does not work.

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AddEventListener In Object Can't Access

Mar 25, 2006

I've created an object and within this object, I've added an eventlistener. But the problem now is that after addEventListener is being called to access a callback function, the callback function is not able to access the properties within its own class. Code:

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How To Pass Arguments Independently Or Using AddEventListener

Sep 10, 2002

I use addEventListener and I cannot (or at least don't know how) pass arguments to the function.

Let's say we have a function:
function warning(arg1, arg2) {alert('Argument 1: ' + arg1 + ', Argument2: ' + arg2 + '.');}

It's possible to have:
onclick="warning('my argument 1', 'my argument 1');" as an html attribut.

But I think it's not posible to do it like this (still the same function):
el.addEventListener("click", warning('my argument 1', 'my argument 1'), false);

So how can I pass arguments to the function?

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