<!--
if (document.images) {
    nexton = new Image();
    nexton.src = "images/nexton.gif"

    nextoff = new Image();
    nextoff.src = "images/nextoff.gif"

    backon = new Image();
    backon.src = "images/backon.gif"

    backoff = new Image();
    backoff.src = "images/backoff.gif"
}

function img_act(imgName) {
    if (document.images) {
        imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
    }
}

function img_inact(imgName) {
    if (document.images) {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
    }
}
// -->