/**
* Javascript code to handle adding functions to event listeners of objects.
* Includes helper functions to add elements to the body's onload. This is
* repeated all over Horde's JavaScript, and this allows for all the details of
* maintaining a list of functions to be called to be encapsulated in one
* function call. Usage: addObjectEventListener(window, 'load', functionobject);
* and addBodyOnload(functionobject);
*
* Copyright 2005 Matt Warden <mwarden@gmail.com>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
*
* @author Matt Warden <mwarden@gmail.com>
*/
function addObjectEventListener(obj, event, funct)
{
// Assign new anonymous function if we're passed a js string
// instead of a function reference.
if (typeof funct == 'string') {
funct = new Function(funct);
}
if (obj.addEventListener) {
obj.addEventListener(event, funct, false);
} else if (obj.attachEvent) {
obj.attachEvent('on'+event, funct);
}
else {
eval('var old = obj.on'+event+';');
if (old != null) {
eval('obj.on'+event+' = function() {'
+'old();'
+'funct();'
+'};');
}
else {
eval('obj.on'+event+' = funct;');
} // end if
} // end if
} // end function addListener
function addBodyOnload(funct)
{
addObjectEventListener(window, 'load', funct);
} // end function addBodyOnload
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