[Javascript] Detecting existence of windows

[Mark Christie]

Dear List:
   I am having a bit of a cross-browser difficulty in the following
function:

function updateconfirm() {
	alert('Your employee information has been updated!');
	window.close();
	if(!window.opener.closed) {
		window.opener.location = window.opener.location + '';
		window.opener.focus();
	}
	
} 

This works wonderfully in IE5.5, but IE5.01 does not seem to like the
.closed property.

Basically, I need to check to see if the opener window is still open, and,
if it is, refresh it.

Am I missing something obvious here?

Regards,
   -Mark C.