Hi folks,
I'm trying to write a simple JS validator and I can't seem to find
any way to test if a particular object exists.  Eg:

// where form.courseCode is a set of radio buttons that may or may
// not exist on the form
var testDates= form.courseCode;
if (testDates actually exists)
{ ... perform the validation ...}

I've tried if (testDates != null), if (testDates) and if
(testDates.length), none of which work.  Any ideas?

TIA,
Raj.
PS: please reply directly since I'm on the digest
-- 
Rajnish Bhaskar
r.bhaskar(at)compserv.gla.ac.uk, http://lordofthemoon.com
IT Education Unit, University of Glasgow
http://www.iteu.gla.ac.uk/
--
Only buffoons refer to the Internet as the Information Superhighway.
      -- (The Rough Guide to the Internet 1999)

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