Multi-Level Menu Snafu

[ChanFan]

I've implemented a multi-level menu for a new site that's about to go live. The menu tests fine in everything except Netscape 6. V6 doesn't even show the main categories. That's not good.... V6 users won't have a menu at all if I can't get this fixed.

Amazingly, the menu shows up and works just fine on all levels in Netscape 4.7.

Here's part of the code:

var JDWMinNS4   = (navigator.appName.indexOf("Netscape") 
>= 0 && parseFloat(navigator.appVersion) >= 4) ? 1 : 0;
var JDWMinNS6   = (navigator.appName.indexOf("Netscape") 
>= 0 && parseFloat(navigator.appVersion) == 6) ? 1 : 0;
var JDWMinIE4   = (document.all) ? 1 : 0;
var JDWMinIE5   = (JDWMinIE4 && navigator.appVersion.indexOf("5.")
>= 0) ? 1 : 0;
var JDWMinIE55  = (JDWMinIE5 && navigator.appVersion.indexOf("5.5")
>= 0) ? 1 : 0;
function hideLayer(layer) {
if (JDWMinNS4) layer.visibility = "hide";
if (JDWMinIE4) layer.style.visibility = "hidden";
}

Any ideas?

P.S. Anybody know how to get a site to cover the entire screen in Netscape, considering Netscape doesn't support the leftmargin=0 and rightmargin=0 attributes? The design of this new site necessitates no left or right margins and of course Netscape provides them anyway.