// Detect if browser is Netscape 3 + or IE 4 +.
bName = navigator.appName;
bVer = parseInt(navigator.appVersion);
    if ((bName == "Netscape" && bVer >= 3) || 
        (bName == "Microsoft Internet Explorer" && bVer >= 4)) br = "n3"; 
    else br = "n2";

// Create image objects, preload all active and inactive images.
    if (br== "n3") { 
    img1on = new Image();          		
    img1on.src = "images/home2.gif";     	
    img2on = new Image();          		
    img2on.src = "images/contact2.gif";     	
    img3on = new Image();          		
    img3on.src = "images/sitemap2.gif";     	
    img4on = new Image();          		
    img4on.src = "images/login2.gif";     	
    img5on = new Image();          		
    img5on.src = "images/whatsnew2.gif";     	
    img6on = new Image();          		
    img6on.src = "images/aboutac2.gif";     	
    img7on = new Image();          		
    img7on.src = "images/aboutde2.gif";     	
    img8on = new Image();          		
    img8on.src = "images/prospective2.gif";     	
    img9on = new Image();          		
    img9on.src = "images/current2.gif";     	
    img10on = new Image();          		
    img10on.src = "images/resource2.gif";     	

    img1off = new Image();          		
    img1off.src = "images/home.gif";     	
    img2off = new Image();          		
    img2off.src = "images/contact.gif";     	
    img3off = new Image();          		
    img3off.src = "images/sitemap.gif";     	
    img4off = new Image();          		
    img4off.src = "images/login.gif";     	
    img5off = new Image();          		
    img5off.src = "images/whatsnew.gif";     	
    img6off = new Image();          		
    img6off.src = "images/aboutac.gif";     	
    img7off = new Image();          		
    img7off.src = "images/aboutde.gif";     	
    img8off = new Image();          		
    img8off.src = "images/prospective.gif";     	
    img9off = new Image();          		
    img9off.src = "images/current.gif";     	
    img10off = new Image();          		
    img10off.src = "images/resource.gif";     	
    }

// Function to "activate" images.
function imgAct(imgName) {
    if (br == "n3") {
    document[imgName].src = eval(imgName + "on.src");
    }
}

// Function to "deactivate" images.
function imgInact(imgName) {
    if (br == "n3") {
    document[imgName].src = eval(imgName + "off.src");
    }
}