function image_on(imgName) {
        imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
}

function image_off(imgName) {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
}

function image_on_middle(imgName) {
        imgOn = eval(imgName + "on.src");
        document ["description"].src = imgOn;
}

function gotolocation(form)
{
var locationnumber=form.locations.selectedIndex;
parent.location=form.locations.options[locationnumber].value;
}