function barRollover (rolloverId) {

    elem = document.getElementById("thumbHiLite"+rolloverId);
    elem.className = "thumbnailBarOn";
}

function barRollout(rolloverId) {
    elem = document.getElementById("thumbHiLite"+rolloverId);
    elem.className = "thumbnailBarOff";
}

if (document.images) {
    var imagesNormal = new Object();
    imagesNormal["arrowright"] = new Image(21, 21);
    imagesNormal["arrowright"].src = "images/arrow_right.gif";
    imagesNormal["arrowleft"] = new Image(21, 21);
    imagesNormal["arrowleft"].src = "images/arrow_left.gif";
	
    var imagesHilite = new Object();
    imagesHilite["arrowright"] = new Image(21, 21);
    imagesHilite["arrowright"].src = "images/arrow_right_over.gif";
    imagesHilite["arrowleft"] = new Image(21, 21);
    imagesHilite["arrowleft"].src = "images/arrow_left_over.gif";
}

function setImage(imgName, type) {
    if (document.images) {
        if (type == "hilite") {
            document.images[imgName].src = imagesHilite[imgName].src;
            return true;
        } else if (type == "normal") {
            document.images[imgName].src = imagesNormal[imgName].src;
            return true;
        }
    }
    return false;
}