Please excuse my delay in getting back to you.

I do not propose to change the address bar: as has been noted by others, that would require a POST redirect which is not well-supported by the major web browsers.

Rather, I propose to hide the address bar entirely (if the user permits). The following example is for my virtual domain's index page:

<a href="http://www.zaimoni.com/" target="_blank" 
OnClick="window.open('http://www.zaimoni.com', '_blank', 
'location=no,scrollbars=yes'); return false">Zaimoni.com</a>
[download]

The above works in both IE5.5 and NS4.79. Since NS6.xx works much like IE5.5, I expect it to work in both NS6.xx and NS7.

In any case, the page opens in a new window if that is supported. Resizing is problematic (I tested that variant), so I would not even consider fixed-width design. The scrollbars=yes fragment tells the web browser to use scrollbars if necessary.

If JavaScript is enabled, the address bar is completely suppressed; only the content of the title tag (the desired URL; <title>http://www.mydomain.com/mypath.pl</title>) will be visible. If JavaScript is disabled/not supported, the address bar will be visible.