Window.Opener Not Working on the Mac

[PatrickGreen]

To All:

On my window_beforeunload, I fire an event which opens a new window and runs the following code to determine if the user is leaving my site:

function CheckStatus()
{
try
{
var mystring = new String(window.opener.location.href);
mystring = mystring.toLowerCase();
if(mystring.indexOf("WebsiteName&quot != -1 {
alert("logoff"
window.location.replace("logoff.asp?GUID=" + GUID + "&UserID=" + UserID);
}
else
{
if (window.opener && !window.opener.closed)
{
self.close();
}
else
{
alert("logoff"
window.location.replace("logoff.asp?GUID=" + GUID + "&UserID=" + UserID);
}
}
}
catch(err)
{
alert(err.message);
window.location.replace("logoff.asp?GUID=" + GUID + "&UserID=" + UserID);
}

}

This works great in windows environment for both Netsape 6+ and IE 5.5+. But on the Mac, when a page is refreshed or the browser is closed, window.opener becomes null and then always causes an error. So I have created a function for the mac which uses window.parent, but window.parent.closed is always false (microsfot bug) and window.parent.location.href, is always the page I am on. Is there any way on the mac to determine correctly if the window that opened the child is still open or still in the domain?

Thanks For Your Help,
Patrick