browserName  = navigator.appName;
browserVer  = parseInt(navigator.appVersion);
if ((browserName  == "Netscape"  && browserVer  >= 3)  || (browserName  == "Microsoft Internet Explorer"  && browserVer  >= 4))  {
    browserOK  = "yes";
} else  {
    browserOK  = "no";
}
if (browserOK  == "yes") {
    forsaleOn  = new Image;
    forsaleOn.src  = "images/forsale1.gif";
    forsaleOff  = new Image;
    forsaleOff.src  = "images/forsale.gif";
}
 {
    aboutOn  = new Image;
    aboutOn.src  = "images/about1.gif";
    aboutOff  = new Image;
    aboutOff.src  = "images/about.gif";
}
 {
    vehiclesOn  = new Image;
    vehiclesOn.src  = "images/vehicles1.gif";
    vehiclesOff  = new Image;
    vehiclesOff.src  = "images/vehicles.gif";
}
 {
    locationOn  = new Image;
    locationOn.src  = "images/location1.gif";
    locationOff  = new Image;
    locationOff.src  = "images/location.gif";
}
 {
    historyOn  = new Image;
    historyOn.src  = "images/history1.gif";
    historyOff  = new Image;
    historyOff.src  = "images/history.gif";
}
 {
    albumOn  = new Image;
    albumOn.src  = "images/album1.gif";
    albumOff  = new Image;
    albumOff.src  = "images/album.gif";
}
 {
    linksOn  = new Image;
    linksOn.src  = "images/links1.gif";
    linksOff  = new Image;
    linksOff.src  = "images/links.gif";
}
 {
    homeOn  = new Image;
    homeOn.src  = "images/home1.gif";
    homeOff  = new Image;
    homeOff.src  = "images/home.gif";
}
function imageOn(imgName)  {
    if (browserOK  == "yes")  {
        imgOn  = eval(imgName  + "On.src");
        document.images[imgName].src  = imgOn;
    }
}
function imageOff(imgName)  {
    if (browserOK  == "yes")  {
        imgOff  = eval(imgName  + "Off.src");
        document.images[imgName].src  = imgOff;
    }
}