[thelist] check existence of a javascript function

[MILLER David R.]

typeof(opener.getAppId)
should return "function" if getAppId is a defined function and "undefined"
if not. typeof is very useful for verifying the existence of any JS object.

---------------FROM-------------------
David R. Miller
Manager, Computer-Based Testing
Medical Council of Canada
dmiller at mcc.ca
(613) 521-6012
(613) 521-9722 (fax)
-----------------------------------------

Original message:
Message: 22
Date: Thu, 24 Jan 2002 11:09:40 -0500
From: Emily E Liang <Emily.Liang at morganstanley.com>
Subject: [thelist] check existence of a javascript function

Hi,

I'm trying to figure out how to check the existence of a javascript
function in the opener window.  I tried all of the following and none
seemed to work.  All returned a javascript error of "opener.getAppId()
is not a function" error when the junction does not exist.  Any help is
greatly appreciated!!!