browserName = navigator.appName;          
browserVer = parseInt(navigator.appVersion);
if ((browserName == "Netscape" && browserVer >= 3) || (browserName == "Microsoft Internet Explorer" && browserVer >= 4)) 
hasImageObject = true;
else 
hasImageObject = false;
if (hasImageObject) {
image1off = new Image();
image1off.src = "../nav1.gif";
image2off = new Image();
image2off.src = "../nav2.gif";
image3off = new Image();
image3off.src = "../nav3.gif";
image4off = new Image(); 
image4off.src = "../nav4.gif";
image5off = new Image(); 
image5off.src = "../map1.gif";
image6off = new Image(); 
image6off.src = "../map2.gif";
image7off = new Image(); 
image7off.src = "../map3.gif";
image8off = new Image(); 
image8off.src = "../map4.gif";
image9off = new Image(); 
image9off.src = "../map5.gif";
image10off = new Image(); 
image10off.src = "../nav5.gif";
image1on = new Image(); 
image1on.src = "../nav1_on.gif";
image2on = new Image(); 
image2on.src = "../nav2_on.gif";
image3on = new Image();
image3on.src = "../nav3_on.gif";
image4on = new Image();
image4on.src = "../nav4_on.gif";
image5on = new Image();
image5on.src = "../map1_on.gif";
image6on = new Image();
image6on.src = "../map2_on.gif";
image7on = new Image();
image7on.src = "../map3_on.gif";
image8on = new Image();
image8on.src = "../map4_on.gif";
image9on = new Image();
image9on.src = "../map5_on.gif";
image10on = new Image();
image10on.src = "../nav5_on.gif"; 
}
function img_act(imgName)
{
if (hasImageObject) {
imgOn = eval(imgName + "on.src");
document[imgName].src = imgOn;
}
}
function img_inact(imgName) {
if (hasImageObject) {
imgOff = eval(imgName + "off.src");
document[imgName].src = imgOff;
}
}
function clearS()
{
window.status="";
return true
}