browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion);
if (browser_name == "Netscape" && browser_version >= 3.0) { roll = 'true'; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) {
     roll = 'true'; }
else { roll = 'false'; }
function over(img,ref) { if (roll == 'true') { document.images[img].src = ref; } }
function out(img,ref) { if (roll == 'true') { document.images[img].src = ref; } }
if (roll == 'true') {
    menu_join       = new Image; menu_join.src       = "images/join2.gif";
    menu_join2       = new Image; menu_join2.src       = "images/join2.gif";
    menu_updates       = new Image; menu_updates.src       = "images/updates2.gif";
    menu_updates2       = new Image; menu_updates2.src       = "images/updates2.gif";
    menu_members       = new Image; menu_members.src       = "images/members3.gif";
    menu_members2       = new Image; menu_members2.src       = "images/members3.gif";
    menu_previews       = new Image; menu_previews.src       = "images/members2.gif";
    menu_previews2       = new Image; menu_previews2.src       = "images/members2.gif";
    menu_tour       = new Image; menu_tour.src       = "images/tour2.gif";
    menu_tour2       = new Image; menu_tour2.src       = "images/tour2.gif";
    
}