Add/Remove an Event

Caleb Duke Nov 17, 2006

General

Use this set of snippets to add or remove events from your scripts. Consists of two functions: addEvent and removeEvent.

Notes

Created by: Caleb Duke
Web Site: http://www.askapache.com/
Posted: November 17, 2006

'obj' parameter: The object which is the focus of the event to be called.
'type' parameter: The name of the event, e.g., "click" or "submit".
'fn' parameter: Reference to a function that is to be called once the event fires. Requires a parameter.

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: addRemoveEvent.js

/* This script and many more are available free online at
The JavaScript Source!! http://www.javascriptsource.com
Created by: Caleb Duke | http://www.askapache.com/ */

//------------------------------------
// heavily based on the Quirksmode addEvent contest winner, John Resig
// addEvent
function addEvent(obj,type,fn){
    if(obj.addEventListener) obj.addEventListener(type,fn,false);
    else if(obj.attachEvent){
        obj["e"+type+fn]=fn;
        obj[type+fn]=function(){obj["e"+type+fn](window.event);}
        obj.attachEvent("on"+type,obj[type+fn]);
    }
}

//------------------------------------
// removeEvent
function removeEvent(obj,type,fn){
  if(obj.removeEventListener) obj.removeEventListener(type,fn,false);
  else if(obj.detachEvent){
    obj.detachEvent("on"+type,obj[type+fn]);
    obj[type+fn]=null;
    obj["e"+type+fn]=null;
  }
}

Head

Paste this code into the HEAD section of your HTML document.


<script type="text/javascript" src="addRemoveEvent.js"></script>

Leave a Response

(1 comment)

helpful script

totaljs Dec 2, 2007

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