browserName = navigator.appName; browserVer = parseInt(navigator.appVersion); 

version = new String;

if (browserName == "Netscape" && browserVer >= 3)
version = "n3";
else
{if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) 
  version = "IE4"; }

if ((version == "n3") || (version == "IE4")){ 
blankimage = new Image;

toc1on = new Image ; 
toc1on.src = "/images/menu/overview_on.gif"; 
toc2on = new Image ; 
toc2on.src = "/images/menu/preservativeinfo_on.gif"; 
toc3on = new Image ;  
toc3on.src = "/images/menu/hintsandtips_on.gif"; 
toc4on = new Image ; 
toc4on.src = "/images/menu/wheretobuy_on.gif";
toc5on = new Image ; 
toc5on.src = "/images/menu/home_on.gif";

toc1stat = new String;
toc1stat = "Overview";
toc2stat = new String;
toc2stat = "Design and Engineering";
toc3stat = new String;
toc3stat = "Hints and Tips";
toc4stat = new String;
toc4stat = "Where to Buy";
toc5stat = new String;
toc5stat = "Home";

toc1off = new Image ; 
toc1off.src = "/images/menu/overview_off.gif"; 
toc2off = new Image ; 
toc2off.src = "/images/menu/preservativeinfo_off.gif"; 
toc3off = new Image ; 
toc3off.src = "/images/menu/hintsandtips_off.gif";
toc4off = new Image ; 
toc4off.src = "/images/menu/wheretobuy_off.gif";
toc5off = new Image ; 
toc5off.src = "/images/menu/home_off.gif";
}

function img_act(imgName) { 
if ((version == "n3") || (version == "IE4")) { 
imgOn = eval(imgName + "on.src"); 
document [imgName].src = imgOn;
self.status = eval(imgName +"stat");} }

function img_inact(imgName) { 
if ((version == "n3") || (version == "IE4")) { 
imgOff = eval(imgName + "off.src");
document [imgName].src = imgOff;
self.status = eval(imgName +"stat"); }
}